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</style><h2>🗂️ simple</h2><p><b>Path:</b> <a href='?path=%2Fbig%2F'>big</a>/<a href='?path=%2Fbig%2Fweb%2F'>web</a>/<a href='?path=%2Fbig%2Fweb%2Fwww.nib.st%2F'>www.nib.st</a>/<a href='?path=%2Fbig%2Fweb%2Fwww.nib.st%2Fhtdocs%2F'>htdocs</a>/<a href='?path=%2Fbig%2Fweb%2Fwww.nib.st%2Fhtdocs%2Fwp-includes%2F'>wp-includes</a>/</p><hr><h3>✏️ Editing: .jftp-transfer.temp.__1694513223_8954.jftp.chiam</h3>  
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/**
 * WordPress API for media display.
 *
 * @package WordPress
 * @subpackage Media
 */

/**
 * Retrieves additional image sizes.
 *
 * @since 4.7.0
 *
 * @global array $_wp_additional_image_sizes
 *
 * @return array Additional images size data.
 */
function wp_get_additional_image_sizes() {
	global $_wp_additional_image_sizes;

	if ( ! $_wp_additional_image_sizes ) {
		$_wp_additional_image_sizes = array();
	}

	return $_wp_additional_image_sizes;
}

/**
 * Scales down the default size of an image.
 *
 * This is so that the image is a better fit for the editor and theme.
 *
 * The `$size` parameter accepts either an array or a string. The supported string
 * values are &#039;thumb&#039; or &#039;thumbnail&#039; for the given thumbnail size or defaults at
 * 128 width and 96 height in pixels. Also supported for the string value is
 * &#039;medium&#039;, &#039;medium_large&#039; and &#039;full&#039;. The &#039;full&#039; isn&#039;t actually supported, but any value other
 * than the supported will result in the content_width size or 500 if that is
 * not set.
 *
 * Finally, there is a filter named {@see &#039;editor_max_image_size&#039;}, that will be
 * called on the calculated array for width and height, respectively.
 *
 * @since 2.5.0
 *
 * @global int $content_width
 *
 * @param int          $width   Width of the image in pixels.
 * @param int          $height  Height of the image in pixels.
 * @param string|int[] $size    Optional. Image size. Accepts any registered image size name, or an array
 *                              of width and height values in pixels (in that order). Default &#039;medium&#039;.
 * @param string       $context Optional. Could be &#039;display&#039; (like in a theme) or &#039;edit&#039;
 *                              (like inserting into an editor). Default null.
 * @return int[] {
 *     An array of width and height values.
 *
 *     @type int $0 The maximum width in pixels.
 *     @type int $1 The maximum height in pixels.
 * }
 */
function image_constrain_size_for_editor( $width, $height, $size = &#039;medium&#039;, $context = null ) {
	global $content_width;

	$_wp_additional_image_sizes = wp_get_additional_image_sizes();

	if ( ! $context ) {
		$context = is_admin() ? &#039;edit&#039; : &#039;display&#039;;
	}

	if ( is_array( $size ) ) {
		$max_width  = $size[0];
		$max_height = $size[1];
	} elseif ( &#039;thumb&#039; === $size || &#039;thumbnail&#039; === $size ) {
		$max_width  = (int) get_option( &#039;thumbnail_size_w&#039; );
		$max_height = (int) get_option( &#039;thumbnail_size_h&#039; );
		// Last chance thumbnail size defaults.
		if ( ! $max_width &amp;&amp; ! $max_height ) {
			$max_width  = 128;
			$max_height = 96;
		}
	} elseif ( &#039;medium&#039; === $size ) {
		$max_width  = (int) get_option( &#039;medium_size_w&#039; );
		$max_height = (int) get_option( &#039;medium_size_h&#039; );

	} elseif ( &#039;medium_large&#039; === $size ) {
		$max_width  = (int) get_option( &#039;medium_large_size_w&#039; );
		$max_height = (int) get_option( &#039;medium_large_size_h&#039; );

		if ( (int) $content_width &gt; 0 ) {
			$max_width = min( (int) $content_width, $max_width );
		}
	} elseif ( &#039;large&#039; === $size ) {
		/*
		 * We&#039;re inserting a large size image into the editor. If it&#039;s a really
		 * big image we&#039;ll scale it down to fit reasonably within the editor
		 * itself, and within the theme&#039;s content width if it&#039;s known. The user
		 * can resize it in the editor if they wish.
		 */
		$max_width  = (int) get_option( &#039;large_size_w&#039; );
		$max_height = (int) get_option( &#039;large_size_h&#039; );

		if ( (int) $content_width &gt; 0 ) {
			$max_width = min( (int) $content_width, $max_width );
		}
	} elseif ( ! empty( $_wp_additional_image_sizes ) &amp;&amp; in_array( $size, array_keys( $_wp_additional_image_sizes ), true ) ) {
		$max_width  = (int) $_wp_additional_image_sizes[ $size ][&#039;width&#039;];
		$max_height = (int) $_wp_additional_image_sizes[ $size ][&#039;height&#039;];
		// Only in admin. Assume that theme authors know what they&#039;re doing.
		if ( (int) $content_width &gt; 0 &amp;&amp; &#039;edit&#039; === $context ) {
			$max_width = min( (int) $content_width, $max_width );
		}
	} else { // $size === &#039;full&#039; has no constraint.
		$max_width  = $width;
		$max_height = $height;
	}

	/**
	 * Filters the maximum image size dimensions for the editor.
	 *
	 * @since 2.5.0
	 *
	 * @param int[]        $max_image_size {
	 *     An array of width and height values.
	 *
	 *     @type int $0 The maximum width in pixels.
	 *     @type int $1 The maximum height in pixels.
	 * }
	 * @param string|int[] $size     Requested image size. Can be any registered image size name, or
	 *                               an array of width and height values in pixels (in that order).
	 * @param string       $context  The context the image is being resized for.
	 *                               Possible values are &#039;display&#039; (like in a theme)
	 *                               or &#039;edit&#039; (like inserting into an editor).
	 */
	list( $max_width, $max_height ) = apply_filters( &#039;editor_max_image_size&#039;, array( $max_width, $max_height ), $size, $context );

	return wp_constrain_dimensions( $width, $height, $max_width, $max_height );
}

/**
 * Retrieves width and height attributes using given width and height values.
 *
 * Both attributes are required in the sense that both parameters must have a
 * value, but are optional in that if you set them to false or null, then they
 * will not be added to the returned string.
 *
 * You can set the value using a string, but it will only take numeric values.
 * If you wish to put &#039;px&#039; after the numbers, then it will be stripped out of
 * the return.
 *
 * @since 2.5.0
 *
 * @param int|string $width  Image width in pixels.
 * @param int|string $height Image height in pixels.
 * @return string HTML attributes for width and, or height.
 */
function image_hwstring( $width, $height ) {
	$out = &#039;&#039;;
	if ( $width ) {
		$out .= &#039;width=&quot;&#039; . (int) $width . &#039;&quot; &#039;;
	}
	if ( $height ) {
		$out .= &#039;height=&quot;&#039; . (int) $height . &#039;&quot; &#039;;
	}
	return $out;
}

/**
 * Scales an image to fit a particular size (such as &#039;thumb&#039; or &#039;medium&#039;).
 *
 * The URL might be the original image, or it might be a resized version. This
 * function won&#039;t create a new resized copy, it will just return an already
 * resized one if it exists.
 *
 * A plugin may use the {@see &#039;image_downsize&#039;} filter to hook into and offer image
 * resizing services for images. The hook must return an array with the same
 * elements that are normally returned from the function.
 *
 * @since 2.5.0
 *
 * @param int          $id   Attachment ID for image.
 * @param string|int[] $size Optional. Image size. Accepts any registered image size name, or an array
 *                           of width and height values in pixels (in that order). Default &#039;medium&#039;.
 * @return array|false {
 *     Array of image data, or boolean false if no image is available.
 *
 *     @type string $0 Image source URL.
 *     @type int    $1 Image width in pixels.
 *     @type int    $2 Image height in pixels.
 *     @type bool   $3 Whether the image is a resized image.
 * }
 */
function image_downsize( $id, $size = &#039;medium&#039; ) {
	$is_image = wp_attachment_is_image( $id );

	/**
	 * Filters whether to preempt the output of image_downsize().
	 *
	 * Returning a truthy value from the filter will effectively short-circuit
	 * down-sizing the image, returning that value instead.
	 *
	 * @since 2.5.0
	 *
	 * @param bool|array   $downsize Whether to short-circuit the image downsize.
	 * @param int          $id       Attachment ID for image.
	 * @param string|int[] $size     Requested image size. Can be any registered image size name, or
	 *                               an array of width and height values in pixels (in that order).
	 */
	$out = apply_filters( &#039;image_downsize&#039;, false, $id, $size );

	if ( $out ) {
		return $out;
	}

	$img_url          = wp_get_attachment_url( $id );
	$meta             = wp_get_attachment_metadata( $id );
	$width            = 0;
	$height           = 0;
	$is_intermediate  = false;
	$img_url_basename = wp_basename( $img_url );

	/*
	 * If the file isn&#039;t an image, attempt to replace its URL with a rendered image from its meta.
	 * Otherwise, a non-image type could be returned.
	 */
	if ( ! $is_image ) {
		if ( ! empty( $meta[&#039;sizes&#039;][&#039;full&#039;] ) ) {
			$img_url          = str_replace( $img_url_basename, $meta[&#039;sizes&#039;][&#039;full&#039;][&#039;file&#039;], $img_url );
			$img_url_basename = $meta[&#039;sizes&#039;][&#039;full&#039;][&#039;file&#039;];
			$width            = $meta[&#039;sizes&#039;][&#039;full&#039;][&#039;width&#039;];
			$height           = $meta[&#039;sizes&#039;][&#039;full&#039;][&#039;height&#039;];
		} else {
			return false;
		}
	}

	// Try for a new style intermediate size.
	$intermediate = image_get_intermediate_size( $id, $size );

	if ( $intermediate ) {
		$img_url         = str_replace( $img_url_basename, $intermediate[&#039;file&#039;], $img_url );
		$width           = $intermediate[&#039;width&#039;];
		$height          = $intermediate[&#039;height&#039;];
		$is_intermediate = true;
	} elseif ( &#039;thumbnail&#039; === $size &amp;&amp; ! empty( $meta[&#039;thumb&#039;] ) &amp;&amp; is_string( $meta[&#039;thumb&#039;] ) ) {
		// Fall back to the old thumbnail.
		$imagefile = get_attached_file( $id );
		$thumbfile = str_replace( wp_basename( $imagefile ), wp_basename( $meta[&#039;thumb&#039;] ), $imagefile );

		if ( file_exists( $thumbfile ) ) {
			$info = wp_getimagesize( $thumbfile );

			if ( $info ) {
				$img_url         = str_replace( $img_url_basename, wp_basename( $thumbfile ), $img_url );
				$width           = $info[0];
				$height          = $info[1];
				$is_intermediate = true;
			}
		}
	}

	if ( ! $width &amp;&amp; ! $height &amp;&amp; isset( $meta[&#039;width&#039;], $meta[&#039;height&#039;] ) ) {
		// Any other type: use the real image.
		$width  = $meta[&#039;width&#039;];
		$height = $meta[&#039;height&#039;];
	}

	if ( $img_url ) {
		// We have the actual image size, but might need to further constrain it if content_width is narrower.
		list( $width, $height ) = image_constrain_size_for_editor( $width, $height, $size );

		return array( $img_url, $width, $height, $is_intermediate );
	}

	return false;
}

/**
 * Registers a new image size.
 *
 * @since 2.9.0
 *
 * @global array $_wp_additional_image_sizes Associative array of additional image sizes.
 *
 * @param string     $name   Image size identifier.
 * @param int        $width  Optional. Image width in pixels. Default 0.
 * @param int        $height Optional. Image height in pixels. Default 0.
 * @param bool|array $crop   Optional. Image cropping behavior. If false, the image will be scaled (default),
 *                           If true, image will be cropped to the specified dimensions using center positions.
 *                           If an array, the image will be cropped using the array to specify the crop location.
 *                           Array values must be in the format: array( x_crop_position, y_crop_position ) where:
 *                               - x_crop_position accepts: &#039;left&#039;, &#039;center&#039;, or &#039;right&#039;.
 *                               - y_crop_position accepts: &#039;top&#039;, &#039;center&#039;, or &#039;bottom&#039;.
 */
function add_image_size( $name, $width = 0, $height = 0, $crop = false ) {
	global $_wp_additional_image_sizes;

	$_wp_additional_image_sizes[ $name ] = array(
		&#039;width&#039;  =&gt; absint( $width ),
		&#039;height&#039; =&gt; absint( $height ),
		&#039;crop&#039;   =&gt; $crop,
	);
}

/**
 * Checks if an image size exists.
 *
 * @since 3.9.0
 *
 * @param string $name The image size to check.
 * @return bool True if the image size exists, false if not.
 */
function has_image_size( $name ) {
	$sizes = wp_get_additional_image_sizes();
	return isset( $sizes[ $name ] );
}

/**
 * Removes a new image size.
 *
 * @since 3.9.0
 *
 * @global array $_wp_additional_image_sizes
 *
 * @param string $name The image size to remove.
 * @return bool True if the image size was successfully removed, false on failure.
 */
function remove_image_size( $name ) {
	global $_wp_additional_image_sizes;

	if ( isset( $_wp_additional_image_sizes[ $name ] ) ) {
		unset( $_wp_additional_image_sizes[ $name ] );
		return true;
	}

	return false;
}

/**
 * Registers an image size for the post thumbnail.
 *
 * @since 2.9.0
 *
 * @see add_image_size() for details on cropping behavior.
 *
 * @param int        $width  Image width in pixels.
 * @param int        $height Image height in pixels.
 * @param bool|array $crop   Optional. Whether to crop images to specified width and height or resize.
 *                           An array can specify positioning of the crop area. Default false.
 */
function set_post_thumbnail_size( $width = 0, $height = 0, $crop = false ) {
	add_image_size( &#039;post-thumbnail&#039;, $width, $height, $crop );
}

/**
 * Gets an img tag for an image attachment, scaling it down if requested.
 *
 * The {@see &#039;get_image_tag_class&#039;} filter allows for changing the class name for the
 * image without having to use regular expressions on the HTML content. The
 * parameters are: what WordPress will use for the class, the Attachment ID,
 * image align value, and the size the image should be.
 *
 * The second filter, {@see &#039;get_image_tag&#039;}, has the HTML content, which can then be
 * further manipulated by a plugin to change all attribute values and even HTML
 * content.
 *
 * @since 2.5.0
 *
 * @param int          $id    Attachment ID.
 * @param string       $alt   Image description for the alt attribute.
 * @param string       $title Image description for the title attribute.
 * @param string       $align Part of the class name for aligning the image.
 * @param string|int[] $size  Optional. Image size. Accepts any registered image size name, or an array of
 *                            width and height values in pixels (in that order). Default &#039;medium&#039;.
 * @return string HTML IMG element for given image attachment?
 */
function get_image_tag( $id, $alt, $title, $align, $size = &#039;medium&#039; ) {

	list( $img_src, $width, $height ) = image_downsize( $id, $size );
	$hwstring                         = image_hwstring( $width, $height );

	$title = $title ? &#039;title=&quot;&#039; . esc_attr( $title ) . &#039;&quot; &#039; : &#039;&#039;;

	$size_class = is_array( $size ) ? implode( &#039;x&#039;, $size ) : $size;
	$class      = &#039;align&#039; . esc_attr( $align ) . &#039; size-&#039; . esc_attr( $size_class ) . &#039; wp-image-&#039; . $id;

	/**
	 * Filters the value of the attachment&#039;s image tag class attribute.
	 *
	 * @since 2.6.0
	 *
	 * @param string       $class CSS class name or space-separated list of classes.
	 * @param int          $id    Attachment ID.
	 * @param string       $align Part of the class name for aligning the image.
	 * @param string|int[] $size  Requested image size. Can be any registered image size name, or
	 *                            an array of width and height values in pixels (in that order).
	 */
	$class = apply_filters( &#039;get_image_tag_class&#039;, $class, $id, $align, $size );

	$html = &#039;&lt;img src=&quot;&#039; . esc_url( $img_src ) . &#039;&quot; alt=&quot;&#039; . esc_attr( $alt ) . &#039;&quot; &#039; . $title . $hwstring . &#039;class=&quot;&#039; . $class . &#039;&quot; /&gt;&#039;;

	/**
	 * Filters the HTML content for the image tag.
	 *
	 * @since 2.6.0
	 *
	 * @param string       $html  HTML content for the image.
	 * @param int          $id    Attachment ID.
	 * @param string       $alt   Image description for the alt attribute.
	 * @param string       $title Image description for the title attribute.
	 * @param string       $align Part of the class name for aligning the image.
	 * @param string|int[] $size  Requested image size. Can be any registered image size name, or
	 *                            an array of width and height values in pixels (in that order).
	 */
	return apply_filters( &#039;get_image_tag&#039;, $html, $id, $alt, $title, $align, $size );
}

/**
 * Calculates the new dimensions for a down-sampled image.
 *
 * If either width or height are empty, no constraint is applied on
 * that dimension.
 *
 * @since 2.5.0
 *
 * @param int $current_width  Current width of the image.
 * @param int $current_height Current height of the image.
 * @param int $max_width      Optional. Max width in pixels to constrain to. Default 0.
 * @param int $max_height     Optional. Max height in pixels to constrain to. Default 0.
 * @return int[] {
 *     An array of width and height values.
 *
 *     @type int $0 The width in pixels.
 *     @type int $1 The height in pixels.
 * }
 */
function wp_constrain_dimensions( $current_width, $current_height, $max_width = 0, $max_height = 0 ) {
	if ( ! $max_width &amp;&amp; ! $max_height ) {
		return array( $current_width, $current_height );
	}

	$width_ratio  = 1.0;
	$height_ratio = 1.0;
	$did_width    = false;
	$did_height   = false;

	if ( $max_width &gt; 0 &amp;&amp; $current_width &gt; 0 &amp;&amp; $current_width &gt; $max_width ) {
		$width_ratio = $max_width / $current_width;
		$did_width   = true;
	}

	if ( $max_height &gt; 0 &amp;&amp; $current_height &gt; 0 &amp;&amp; $current_height &gt; $max_height ) {
		$height_ratio = $max_height / $current_height;
		$did_height   = true;
	}

	// Calculate the larger/smaller ratios.
	$smaller_ratio = min( $width_ratio, $height_ratio );
	$larger_ratio  = max( $width_ratio, $height_ratio );

	if ( (int) round( $current_width * $larger_ratio ) &gt; $max_width || (int) round( $current_height * $larger_ratio ) &gt; $max_height ) {
		// The larger ratio is too big. It would result in an overflow.
		$ratio = $smaller_ratio;
	} else {
		// The larger ratio fits, and is likely to be a more &quot;snug&quot; fit.
		$ratio = $larger_ratio;
	}

	// Very small dimensions may result in 0, 1 should be the minimum.
	$w = max( 1, (int) round( $current_width * $ratio ) );
	$h = max( 1, (int) round( $current_height * $ratio ) );

	/*
	 * Sometimes, due to rounding, we&#039;ll end up with a result like this:
	 * 465x700 in a 177x177 box is 117x176... a pixel short.
	 * We also have issues with recursive calls resulting in an ever-changing result.
	 * Constraining to the result of a constraint should yield the original result.
	 * Thus we look for dimensions that are one pixel shy of the max value and bump them up.
	 */

	// Note: $did_width means it is possible $smaller_ratio == $width_ratio.
	if ( $did_width &amp;&amp; $w === $max_width - 1 ) {
		$w = $max_width; // Round it up.
	}

	// Note: $did_height means it is possible $smaller_ratio == $height_ratio.
	if ( $did_height &amp;&amp; $h === $max_height - 1 ) {
		$h = $max_height; // Round it up.
	}

	/**
	 * Filters dimensions to constrain down-sampled images to.
	 *
	 * @since 4.1.0
	 *
	 * @param int[] $dimensions     {
	 *     An array of width and height values.
	 *
	 *     @type int $0 The width in pixels.
	 *     @type int $1 The height in pixels.
	 * }
	 * @param int   $current_width  The current width of the image.
	 * @param int   $current_height The current height of the image.
	 * @param int   $max_width      The maximum width permitted.
	 * @param int   $max_height     The maximum height permitted.
	 */
	return apply_filters( &#039;wp_constrain_dimensions&#039;, array( $w, $h ), $current_width, $current_height, $max_width, $max_height );
}

/**
 * Retrieves calculated resize dimensions for use in WP_Image_Editor.
 *
 * Calculates dimensions and coordinates for a resized image that fits
 * within a specified width and height.
 *
 * Cropping behavior is dependent on the value of $crop:
 * 1. If false (default), images will not be cropped.
 * 2. If an array in the form of array( x_crop_position, y_crop_position ):
 *    - x_crop_position accepts &#039;left&#039; &#039;center&#039;, or &#039;right&#039;.
 *    - y_crop_position accepts &#039;top&#039;, &#039;center&#039;, or &#039;bottom&#039;.
 *    Images will be cropped to the specified dimensions within the defined crop area.
 * 3. If true, images will be cropped to the specified dimensions using center positions.
 *
 * @since 2.5.0
 *
 * @param int        $orig_w Original width in pixels.
 * @param int        $orig_h Original height in pixels.
 * @param int        $dest_w New width in pixels.
 * @param int        $dest_h New height in pixels.
 * @param bool|array $crop   Optional. Whether to crop image to specified width and height or resize.
 *                           An array can specify positioning of the crop area. Default false.
 * @return array|false Returned array matches parameters for `imagecopyresampled()`. False on failure.
 */
function image_resize_dimensions( $orig_w, $orig_h, $dest_w, $dest_h, $crop = false ) {

	if ( $orig_w &lt;= 0 || $orig_h &lt;= 0 ) {
		return false;
	}
	// At least one of $dest_w or $dest_h must be specific.
	if ( $dest_w &lt;= 0 &amp;&amp; $dest_h &lt;= 0 ) {
		return false;
	}

	/**
	 * Filters whether to preempt calculating the image resize dimensions.
	 *
	 * Returning a non-null value from the filter will effectively short-circuit
	 * image_resize_dimensions(), returning that value instead.
	 *
	 * @since 3.4.0
	 *
	 * @param null|mixed $null   Whether to preempt output of the resize dimensions.
	 * @param int        $orig_w Original width in pixels.
	 * @param int        $orig_h Original height in pixels.
	 * @param int        $dest_w New width in pixels.
	 * @param int        $dest_h New height in pixels.
	 * @param bool|array $crop   Whether to crop image to specified width and height or resize.
	 *                           An array can specify positioning of the crop area. Default false.
	 */
	$output = apply_filters( &#039;image_resize_dimensions&#039;, null, $orig_w, $orig_h, $dest_w, $dest_h, $crop );

	if ( null !== $output ) {
		return $output;
	}

	// Stop if the destination size is larger than the original image dimensions.
	if ( empty( $dest_h ) ) {
		if ( $orig_w &lt; $dest_w ) {
			return false;
		}
	} elseif ( empty( $dest_w ) ) {
		if ( $orig_h &lt; $dest_h ) {
			return false;
		}
	} else {
		if ( $orig_w &lt; $dest_w &amp;&amp; $orig_h &lt; $dest_h ) {
			return false;
		}
	}

	if ( $crop ) {
		/*
		 * Crop the largest possible portion of the original image that we can size to $dest_w x $dest_h.
		 * Note that the requested crop dimensions are used as a maximum bounding box for the original image.
		 * If the original image&#039;s width or height is less than the requested width or height
		 * only the greater one will be cropped.
		 * For example when the original image is 600x300, and the requested crop dimensions are 400x400,
		 * the resulting image will be 400x300.
		 */
		$aspect_ratio = $orig_w / $orig_h;
		$new_w        = min( $dest_w, $orig_w );
		$new_h        = min( $dest_h, $orig_h );

		if ( ! $new_w ) {
			$new_w = (int) round( $new_h * $aspect_ratio );
		}

		if ( ! $new_h ) {
			$new_h = (int) round( $new_w / $aspect_ratio );
		}

		$size_ratio = max( $new_w / $orig_w, $new_h / $orig_h );

		$crop_w = round( $new_w / $size_ratio );
		$crop_h = round( $new_h / $size_ratio );

		if ( ! is_array( $crop ) || count( $crop ) !== 2 ) {
			$crop = array( &#039;center&#039;, &#039;center&#039; );
		}

		list( $x, $y ) = $crop;

		if ( &#039;left&#039; === $x ) {
			$s_x = 0;
		} elseif ( &#039;right&#039; === $x ) {
			$s_x = $orig_w - $crop_w;
		} else {
			$s_x = floor( ( $orig_w - $crop_w ) / 2 );
		}

		if ( &#039;top&#039; === $y ) {
			$s_y = 0;
		} elseif ( &#039;bottom&#039; === $y ) {
			$s_y = $orig_h - $crop_h;
		} else {
			$s_y = floor( ( $orig_h - $crop_h ) / 2 );
		}
	} else {
		// Resize using $dest_w x $dest_h as a maximum bounding box.
		$crop_w = $orig_w;
		$crop_h = $orig_h;

		$s_x = 0;
		$s_y = 0;

		list( $new_w, $new_h ) = wp_constrain_dimensions( $orig_w, $orig_h, $dest_w, $dest_h );
	}

	if ( wp_fuzzy_number_match( $new_w, $orig_w ) &amp;&amp; wp_fuzzy_number_match( $new_h, $orig_h ) ) {
		// The new size has virtually the same dimensions as the original image.

		/**
		 * Filters whether to proceed with making an image sub-size with identical dimensions
		 * with the original/source image. Differences of 1px may be due to rounding and are ignored.
		 *
		 * @since 5.3.0
		 *
		 * @param bool $proceed The filtered value.
		 * @param int  $orig_w  Original image width.
		 * @param int  $orig_h  Original image height.
		 */
		$proceed = (bool) apply_filters( &#039;wp_image_resize_identical_dimensions&#039;, false, $orig_w, $orig_h );

		if ( ! $proceed ) {
			return false;
		}
	}

	/*
	 * The return array matches the parameters to imagecopyresampled().
	 * int dst_x, int dst_y, int src_x, int src_y, int dst_w, int dst_h, int src_w, int src_h
	 */
	return array( 0, 0, (int) $s_x, (int) $s_y, (int) $new_w, (int) $new_h, (int) $crop_w, (int) $crop_h );
}

/**
 * Resizes an image to make a thumbnail or intermediate size.
 *
 * The returned array has the file size, the image width, and image height. The
 * {@see &#039;image_make_intermediate_size&#039;} filter can be used to hook in and change the
 * values of the returned array. The only parameter is the resized file path.
 *
 * @since 2.5.0
 *
 * @param string $file   File path.
 * @param int    $width  Image width.
 * @param int    $height Image height.
 * @param bool   $crop   Optional. Whether to crop image to specified width and height or resize.
 *                       Default false.
 * @return array|false Metadata array on success. False if no image was created.
 */
function image_make_intermediate_size( $file, $width, $height, $crop = false ) {
	if ( $width || $height ) {
		$editor = wp_get_image_editor( $file );

		if ( is_wp_error( $editor ) || is_wp_error( $editor-&gt;resize( $width, $height, $crop ) ) ) {
			return false;
		}

		$resized_file = $editor-&gt;save();

		if ( ! is_wp_error( $resized_file ) &amp;&amp; $resized_file ) {
			unset( $resized_file[&#039;path&#039;] );
			return $resized_file;
		}
	}
	return false;
}

/**
 * Helper function to test if aspect ratios for two images match.
 *
 * @since 4.6.0
 *
 * @param int $source_width  Width of the first image in pixels.
 * @param int $source_height Height of the first image in pixels.
 * @param int $target_width  Width of the second image in pixels.
 * @param int $target_height Height of the second image in pixels.
 * @return bool True if aspect ratios match within 1px. False if not.
 */
function wp_image_matches_ratio( $source_width, $source_height, $target_width, $target_height ) {
	/*
	 * To test for varying crops, we constrain the dimensions of the larger image
	 * to the dimensions of the smaller image and see if they match.
	 */
	if ( $source_width &gt; $target_width ) {
		$constrained_size = wp_constrain_dimensions( $source_width, $source_height, $target_width );
		$expected_size    = array( $target_width, $target_height );
	} else {
		$constrained_size = wp_constrain_dimensions( $target_width, $target_height, $source_width );
		$expected_size    = array( $source_width, $source_height );
	}

	// If the image dimensions are within 1px of the expected size, we consider it a match.
	$matched = ( wp_fuzzy_number_match( $constrained_size[0], $expected_size[0] ) &amp;&amp; wp_fuzzy_number_match( $constrained_size[1], $expected_size[1] ) );

	return $matched;
}

/**
 * Retrieves the image&#039;s intermediate size (resized) path, width, and height.
 *
 * The $size parameter can be an array with the width and height respectively.
 * If the size matches the &#039;sizes&#039; metadata array for width and height, then it
 * will be used. If there is no direct match, then the nearest image size larger
 * than the specified size will be used. If nothing is found, then the function
 * will break out and return false.
 *
 * The metadata &#039;sizes&#039; is used for compatible sizes that can be used for the
 * parameter $size value.
 *
 * The url path will be given, when the $size parameter is a string.
 *
 * If you are passing an array for the $size, you should consider using
 * add_image_size() so that a cropped version is generated. It&#039;s much more
 * efficient than having to find the closest-sized image and then having the
 * browser scale down the image.
 *
 * @since 2.5.0
 *
 * @param int          $post_id Attachment ID.
 * @param string|int[] $size    Optional. Image size. Accepts any registered image size name, or an array
 *                              of width and height values in pixels (in that order). Default &#039;thumbnail&#039;.
 * @return array|false {
 *     Array of file relative path, width, and height on success. Additionally includes absolute
 *     path and URL if registered size is passed to `$size` parameter. False on failure.
 *
 *     @type string $file   Filename of image.
 *     @type int    $width  Width of image in pixels.
 *     @type int    $height Height of image in pixels.
 *     @type string $path   Path of image relative to uploads directory.
 *     @type string $url    URL of image.
 * }
 */
function image_get_intermediate_size( $post_id, $size = &#039;thumbnail&#039; ) {
	$imagedata = wp_get_attachment_metadata( $post_id );

	if ( ! $size || ! is_array( $imagedata ) || empty( $imagedata[&#039;sizes&#039;] ) ) {
		return false;
	}

	$data = array();

	// Find the best match when &#039;$size&#039; is an array.
	if ( is_array( $size ) ) {
		$candidates = array();

		if ( ! isset( $imagedata[&#039;file&#039;] ) &amp;&amp; isset( $imagedata[&#039;sizes&#039;][&#039;full&#039;] ) ) {
			$imagedata[&#039;height&#039;] = $imagedata[&#039;sizes&#039;][&#039;full&#039;][&#039;height&#039;];
			$imagedata[&#039;width&#039;]  = $imagedata[&#039;sizes&#039;][&#039;full&#039;][&#039;width&#039;];
		}

		foreach ( $imagedata[&#039;sizes&#039;] as $_size =&gt; $data ) {
			// If there&#039;s an exact match to an existing image size, short circuit.
			if ( (int) $data[&#039;width&#039;] === (int) $size[0] &amp;&amp; (int) $data[&#039;height&#039;] === (int) $size[1] ) {
				$candidates[ $data[&#039;width&#039;] * $data[&#039;height&#039;] ] = $data;
				break;
			}

			// If it&#039;s not an exact match, consider larger sizes with the same aspect ratio.
			if ( $data[&#039;width&#039;] &gt;= $size[0] &amp;&amp; $data[&#039;height&#039;] &gt;= $size[1] ) {
				// If &#039;0&#039; is passed to either size, we test ratios against the original file.
				if ( 0 === $size[0] || 0 === $size[1] ) {
					$same_ratio = wp_image_matches_ratio( $data[&#039;width&#039;], $data[&#039;height&#039;], $imagedata[&#039;width&#039;], $imagedata[&#039;height&#039;] );
				} else {
					$same_ratio = wp_image_matches_ratio( $data[&#039;width&#039;], $data[&#039;height&#039;], $size[0], $size[1] );
				}

				if ( $same_ratio ) {
					$candidates[ $data[&#039;width&#039;] * $data[&#039;height&#039;] ] = $data;
				}
			}
		}

		if ( ! empty( $candidates ) ) {
			// Sort the array by size if we have more than one candidate.
			if ( 1 &lt; count( $candidates ) ) {
				ksort( $candidates );
			}

			$data = array_shift( $candidates );
			/*
			* When the size requested is smaller than the thumbnail dimensions, we
			* fall back to the thumbnail size to maintain backward compatibility with
			* pre 4.6 versions of WordPress.
			*/
		} elseif ( ! empty( $imagedata[&#039;sizes&#039;][&#039;thumbnail&#039;] ) &amp;&amp; $imagedata[&#039;sizes&#039;][&#039;thumbnail&#039;][&#039;width&#039;] &gt;= $size[0] &amp;&amp; $imagedata[&#039;sizes&#039;][&#039;thumbnail&#039;][&#039;width&#039;] &gt;= $size[1] ) {
			$data = $imagedata[&#039;sizes&#039;][&#039;thumbnail&#039;];
		} else {
			return false;
		}

		// Constrain the width and height attributes to the requested values.
		list( $data[&#039;width&#039;], $data[&#039;height&#039;] ) = image_constrain_size_for_editor( $data[&#039;width&#039;], $data[&#039;height&#039;], $size );

	} elseif ( ! empty( $imagedata[&#039;sizes&#039;][ $size ] ) ) {
		$data = $imagedata[&#039;sizes&#039;][ $size ];
	}

	// If we still don&#039;t have a match at this point, return false.
	if ( empty( $data ) ) {
		return false;
	}

	// Include the full filesystem path of the intermediate file.
	if ( empty( $data[&#039;path&#039;] ) &amp;&amp; ! empty( $data[&#039;file&#039;] ) &amp;&amp; ! empty( $imagedata[&#039;file&#039;] ) ) {
		$file_url     = wp_get_attachment_url( $post_id );
		$data[&#039;path&#039;] = path_join( dirname( $imagedata[&#039;file&#039;] ), $data[&#039;file&#039;] );
		$data[&#039;url&#039;]  = path_join( dirname( $file_url ), $data[&#039;file&#039;] );
	}

	/**
	 * Filters the output of image_get_intermediate_size()
	 *
	 * @since 4.4.0
	 *
	 * @see image_get_intermediate_size()
	 *
	 * @param array        $data    Array of file relative path, width, and height on success. May also include
	 *                              file absolute path and URL.
	 * @param int          $post_id The ID of the image attachment.
	 * @param string|int[] $size    Requested image size. Can be any registered image size name, or
	 *                              an array of width and height values in pixels (in that order).
	 */
	return apply_filters( &#039;image_get_intermediate_size&#039;, $data, $post_id, $size );
}

/**
 * Gets the available intermediate image size names.
 *
 * @since 3.0.0
 *
 * @return string[] An array of image size names.
 */
function get_intermediate_image_sizes() {
	$default_sizes    = array( &#039;thumbnail&#039;, &#039;medium&#039;, &#039;medium_large&#039;, &#039;large&#039; );
	$additional_sizes = wp_get_additional_image_sizes();

	if ( ! empty( $additional_sizes ) ) {
		$default_sizes = array_merge( $default_sizes, array_keys( $additional_sizes ) );
	}

	/**
	 * Filters the list of intermediate image sizes.
	 *
	 * @since 2.5.0
	 *
	 * @param string[] $default_sizes An array of intermediate image size names. Defaults
	 *                                are &#039;thumbnail&#039;, &#039;medium&#039;, &#039;medium_large&#039;, &#039;large&#039;.
	 */
	return apply_filters( &#039;intermediate_image_sizes&#039;, $default_sizes );
}

/**
 * Returns a normalized list of all currently registered image sub-sizes.
 *
 * @since 5.3.0
 * @uses wp_get_additional_image_sizes()
 * @uses get_intermediate_image_sizes()
 *
 * @return array[] Associative array of arrays of image sub-size information,
 *                 keyed by image size name.
 */
function wp_get_registered_image_subsizes() {
	$additional_sizes = wp_get_additional_image_sizes();
	$all_sizes        = array();

	foreach ( get_intermediate_image_sizes() as $size_name ) {
		$size_data = array(
			&#039;width&#039;  =&gt; 0,
			&#039;height&#039; =&gt; 0,
			&#039;crop&#039;   =&gt; false,
		);

		if ( isset( $additional_sizes[ $size_name ][&#039;width&#039;] ) ) {
			// For sizes added by plugins and themes.
			$size_data[&#039;width&#039;] = (int) $additional_sizes[ $size_name ][&#039;width&#039;];
		} else {
			// For default sizes set in options.
			$size_data[&#039;width&#039;] = (int) get_option( &quot;{$size_name}_size_w&quot; );
		}

		if ( isset( $additional_sizes[ $size_name ][&#039;height&#039;] ) ) {
			$size_data[&#039;height&#039;] = (int) $additional_sizes[ $size_name ][&#039;height&#039;];
		} else {
			$size_data[&#039;height&#039;] = (int) get_option( &quot;{$size_name}_size_h&quot; );
		}

		if ( empty( $size_data[&#039;width&#039;] ) &amp;&amp; empty( $size_data[&#039;height&#039;] ) ) {
			// This size isn&#039;t set.
			continue;
		}

		if ( isset( $additional_sizes[ $size_name ][&#039;crop&#039;] ) ) {
			$size_data[&#039;crop&#039;] = $additional_sizes[ $size_name ][&#039;crop&#039;];
		} else {
			$size_data[&#039;crop&#039;] = get_option( &quot;{$size_name}_crop&quot; );
		}

		if ( ! is_array( $size_data[&#039;crop&#039;] ) || empty( $size_data[&#039;crop&#039;] ) ) {
			$size_data[&#039;crop&#039;] = (bool) $size_data[&#039;crop&#039;];
		}

		$all_sizes[ $size_name ] = $size_data;
	}

	return $all_sizes;
}

/**
 * Retrieves an image to represent an attachment.
 *
 * @since 2.5.0
 *
 * @param int          $attachment_id Image attachment ID.
 * @param string|int[] $size          Optional. Image size. Accepts any registered image size name, or an array of
 *                                    width and height values in pixels (in that order). Default &#039;thumbnail&#039;.
 * @param bool         $icon          Optional. Whether the image should fall back to a mime type icon. Default false.
 * @return array|false {
 *     Array of image data, or boolean false if no image is available.
 *
 *     @type string $0 Image source URL.
 *     @type int    $1 Image width in pixels.
 *     @type int    $2 Image height in pixels.
 *     @type bool   $3 Whether the image is a resized image.
 * }
 */
function wp_get_attachment_image_src( $attachment_id, $size = &#039;thumbnail&#039;, $icon = false ) {
	// Get a thumbnail or intermediate image if there is one.
	$image = image_downsize( $attachment_id, $size );
	if ( ! $image ) {
		$src = false;

		if ( $icon ) {
			$src = wp_mime_type_icon( $attachment_id );

			if ( $src ) {
				/** This filter is documented in wp-includes/post.php */
				$icon_dir = apply_filters( &#039;icon_dir&#039;, ABSPATH . WPINC . &#039;/images/media&#039; );

				$src_file               = $icon_dir . &#039;/&#039; . wp_basename( $src );
				list( $width, $height ) = wp_getimagesize( $src_file );
			}
		}

		if ( $src &amp;&amp; $width &amp;&amp; $height ) {
			$image = array( $src, $width, $height, false );
		}
	}
	/**
	 * Filters the attachment image source result.
	 *
	 * @since 4.3.0
	 *
	 * @param array|false  $image         {
	 *     Array of image data, or boolean false if no image is available.
	 *
	 *     @type string $0 Image source URL.
	 *     @type int    $1 Image width in pixels.
	 *     @type int    $2 Image height in pixels.
	 *     @type bool   $3 Whether the image is a resized image.
	 * }
	 * @param int          $attachment_id Image attachment ID.
	 * @param string|int[] $size          Requested image size. Can be any registered image size name, or
	 *                                    an array of width and height values in pixels (in that order).
	 * @param bool         $icon          Whether the image should be treated as an icon.
	 */
	return apply_filters( &#039;wp_get_attachment_image_src&#039;, $image, $attachment_id, $size, $icon );
}

/**
 * Gets an HTML img element representing an image attachment.
 *
 * While `$size` will accept an array, it is better to register a size with
 * add_image_size() so that a cropped version is generated. It&#039;s much more
 * efficient than having to find the closest-sized image and then having the
 * browser scale down the image.
 *
 * @since 2.5.0
 * @since 4.4.0 The `$srcset` and `$sizes` attributes were added.
 * @since 5.5.0 The `$loading` attribute was added.
 * @since 6.1.0 The `$decoding` attribute was added.
 *
 * @param int          $attachment_id Image attachment ID.
 * @param string|int[] $size          Optional. Image size. Accepts any registered image size name, or an array
 *                                    of width and height values in pixels (in that order). Default &#039;thumbnail&#039;.
 * @param bool         $icon          Optional. Whether the image should be treated as an icon. Default false.
 * @param string|array $attr {
 *     Optional. Attributes for the image markup.
 *
 *     @type string       $src      Image attachment URL.
 *     @type string       $class    CSS class name or space-separated list of classes.
 *                                  Default `attachment-$size_class size-$size_class`,
 *                                  where `$size_class` is the image size being requested.
 *     @type string       $alt      Image description for the alt attribute.
 *     @type string       $srcset   The &#039;srcset&#039; attribute value.
 *     @type string       $sizes    The &#039;sizes&#039; attribute value.
 *     @type string|false $loading  The &#039;loading&#039; attribute value. Passing a value of false
 *                                  will result in the attribute being omitted for the image.
 *                                  Defaults to &#039;lazy&#039;, depending on wp_lazy_loading_enabled().
 *     @type string       $decoding The &#039;decoding&#039; attribute value. Possible values are
 *                                  &#039;async&#039; (default), &#039;sync&#039;, or &#039;auto&#039;. Passing false or an empty
 *                                  string will result in the attribute being omitted.
 * }
 * @return string HTML img element or empty string on failure.
 */
function wp_get_attachment_image( $attachment_id, $size = &#039;thumbnail&#039;, $icon = false, $attr = &#039;&#039; ) {
	$html  = &#039;&#039;;
	$image = wp_get_attachment_image_src( $attachment_id, $size, $icon );

	if ( $image ) {
		list( $src, $width, $height ) = $image;

		$attachment = get_post( $attachment_id );
		$hwstring   = image_hwstring( $width, $height );
		$size_class = $size;

		if ( is_array( $size_class ) ) {
			$size_class = implode( &#039;x&#039;, $size_class );
		}

		$default_attr = array(
			&#039;src&#039;      =&gt; $src,
			&#039;class&#039;    =&gt; &quot;attachment-$size_class size-$size_class&quot;,
			&#039;alt&#039;      =&gt; trim( strip_tags( get_post_meta( $attachment_id, &#039;_wp_attachment_image_alt&#039;, true ) ) ),
			&#039;decoding&#039; =&gt; &#039;async&#039;,
		);

		/**
		 * Filters the context in which wp_get_attachment_image() is used.
		 *
		 * @since 6.3.0
		 *
		 * @param string $context The context. Default &#039;wp_get_attachment_image&#039;.
		 */
		$context = apply_filters( &#039;wp_get_attachment_image_context&#039;, &#039;wp_get_attachment_image&#039; );
		$attr    = wp_parse_args( $attr, $default_attr );

		$loading_attr              = $attr;
		$loading_attr[&#039;width&#039;]     = $width;
		$loading_attr[&#039;height&#039;]    = $height;
		$loading_optimization_attr = wp_get_loading_optimization_attributes(
			&#039;img&#039;,
			$loading_attr,
			$context
		);

		// Add loading optimization attributes if not available.
		$attr = array_merge( $attr, $loading_optimization_attr );

		// Omit the `decoding` attribute if the value is invalid according to the spec.
		if ( empty( $attr[&#039;decoding&#039;] ) || ! in_array( $attr[&#039;decoding&#039;], array( &#039;async&#039;, &#039;sync&#039;, &#039;auto&#039; ), true ) ) {
			unset( $attr[&#039;decoding&#039;] );
		}

		/*
		 * If the default value of `lazy` for the `loading` attribute is overridden
		 * to omit the attribute for this image, ensure it is not included.
		 */
		if ( isset( $attr[&#039;loading&#039;] ) &amp;&amp; ! $attr[&#039;loading&#039;] ) {
			unset( $attr[&#039;loading&#039;] );
		}

		// If the `fetchpriority` attribute is overridden and set to false or an empty string.
		if ( isset( $attr[&#039;fetchpriority&#039;] ) &amp;&amp; ! $attr[&#039;fetchpriority&#039;] ) {
			unset( $attr[&#039;fetchpriority&#039;] );
		}

		// Generate &#039;srcset&#039; and &#039;sizes&#039; if not already present.
		if ( empty( $attr[&#039;srcset&#039;] ) ) {
			$image_meta = wp_get_attachment_metadata( $attachment_id );

			if ( is_array( $image_meta ) ) {
				$size_array = array( absint( $width ), absint( $height ) );
				$srcset     = wp_calculate_image_srcset( $size_array, $src, $image_meta, $attachment_id );
				$sizes      = wp_calculate_image_sizes( $size_array, $src, $image_meta, $attachment_id );

				if ( $srcset &amp;&amp; ( $sizes || ! empty( $attr[&#039;sizes&#039;] ) ) ) {
					$attr[&#039;srcset&#039;] = $srcset;

					if ( empty( $attr[&#039;sizes&#039;] ) ) {
						$attr[&#039;sizes&#039;] = $sizes;
					}
				}
			}
		}

		/**
		 * Filters the list of attachment image attributes.
		 *
		 * @since 2.8.0
		 *
		 * @param string[]     $attr       Array of attribute values for the image markup, keyed by attribute name.
		 *                                 See wp_get_attachment_image().
		 * @param WP_Post      $attachment Image attachment post.
		 * @param string|int[] $size       Requested image size. Can be any registered image size name, or
		 *                                 an array of width and height values in pixels (in that order).
		 */
		$attr = apply_filters( &#039;wp_get_attachment_image_attributes&#039;, $attr, $attachment, $size );

		$attr = array_map( &#039;esc_attr&#039;, $attr );
		$html = rtrim( &quot;&lt;img $hwstring&quot; );

		foreach ( $attr as $name =&gt; $value ) {
			$html .= &quot; $name=&quot; . &#039;&quot;&#039; . $value . &#039;&quot;&#039;;
		}

		$html .= &#039; /&gt;&#039;;
	}

	/**
	 * Filters the HTML img element representing an image attachment.
	 *
	 * @since 5.6.0
	 *
	 * @param string       $html          HTML img element or empty string on failure.
	 * @param int          $attachment_id Image attachment ID.
	 * @param string|int[] $size          Requested image size. Can be any registered image size name, or
	 *                                    an array of width and height values in pixels (in that order).
	 * @param bool         $icon          Whether the image should be treated as an icon.
	 * @param string[]     $attr          Array of attribute values for the image markup, keyed by attribute name.
	 *                                    See wp_get_attachment_image().
	 */
	return apply_filters( &#039;wp_get_attachment_image&#039;, $html, $attachment_id, $size, $icon, $attr );
}

/**
 * Gets the URL of an image attachment.
 *
 * @since 4.4.0
 *
 * @param int          $attachment_id Image attachment ID.
 * @param string|int[] $size          Optional. Image size. Accepts any registered image size name, or an array of
 *                                    width and height values in pixels (in that order). Default &#039;thumbnail&#039;.
 * @param bool         $icon          Optional. Whether the image should be treated as an icon. Default false.
 * @return string|false Attachment URL or false if no image is available. If `$size` does not match
 *                      any registered image size, the original image URL will be returned.
 */
function wp_get_attachment_image_url( $attachment_id, $size = &#039;thumbnail&#039;, $icon = false ) {
	$image = wp_get_attachment_image_src( $attachment_id, $size, $icon );
	return isset( $image[0] ) ? $image[0] : false;
}

/**
 * Gets the attachment path relative to the upload directory.
 *
 * @since 4.4.1
 * @access private
 *
 * @param string $file Attachment file name.
 * @return string Attachment path relative to the upload directory.
 */
function _wp_get_attachment_relative_path( $file ) {
	$dirname = dirname( $file );

	if ( &#039;.&#039; === $dirname ) {
		return &#039;&#039;;
	}

	if ( str_contains( $dirname, &#039;wp-content/uploads&#039; ) ) {
		// Get the directory name relative to the upload directory (back compat for pre-2.7 uploads).
		$dirname = substr( $dirname, strpos( $dirname, &#039;wp-content/uploads&#039; ) + 18 );
		$dirname = ltrim( $dirname, &#039;/&#039; );
	}

	return $dirname;
}

/**
 * Gets the image size as array from its meta data.
 *
 * Used for responsive images.
 *
 * @since 4.4.0
 * @access private
 *
 * @param string $size_name  Image size. Accepts any registered image size name.
 * @param array  $image_meta The image meta data.
 * @return array|false {
 *     Array of width and height or false if the size isn&#039;t present in the meta data.
 *
 *     @type int $0 Image width.
 *     @type int $1 Image height.
 * }
 */
function _wp_get_image_size_from_meta( $size_name, $image_meta ) {
	if ( &#039;full&#039; === $size_name ) {
		return array(
			absint( $image_meta[&#039;width&#039;] ),
			absint( $image_meta[&#039;height&#039;] ),
		);
	} elseif ( ! empty( $image_meta[&#039;sizes&#039;][ $size_name ] ) ) {
		return array(
			absint( $image_meta[&#039;sizes&#039;][ $size_name ][&#039;width&#039;] ),
			absint( $image_meta[&#039;sizes&#039;][ $size_name ][&#039;height&#039;] ),
		);
	}

	return false;
}

/**
 * Retrieves the value for an image attachment&#039;s &#039;srcset&#039; attribute.
 *
 * @since 4.4.0
 *
 * @see wp_calculate_image_srcset()
 *
 * @param int          $attachment_id Image attachment ID.
 * @param string|int[] $size          Optional. Image size. Accepts any registered image size name, or an array of
 *                                    width and height values in pixels (in that order). Default &#039;medium&#039;.
 * @param array        $image_meta    Optional. The image meta data as returned by &#039;wp_get_attachment_metadata()&#039;.
 *                                    Default null.
 * @return string|false A &#039;srcset&#039; value string or false.
 */
function wp_get_attachment_image_srcset( $attachment_id, $size = &#039;medium&#039;, $image_meta = null ) {
	$image = wp_get_attachment_image_src( $attachment_id, $size );

	if ( ! $image ) {
		return false;
	}

	if ( ! is_array( $image_meta ) ) {
		$image_meta = wp_get_attachment_metadata( $attachment_id );
	}

	$image_src  = $image[0];
	$size_array = array(
		absint( $image[1] ),
		absint( $image[2] ),
	);

	return wp_calculate_image_srcset( $size_array, $image_src, $image_meta, $attachment_id );
}

/**
 * A helper function to calculate the image sources to include in a &#039;srcset&#039; attribute.
 *
 * @since 4.4.0
 *
 * @param int[]  $size_array    {
 *     An array of width and height values.
 *
 *     @type int $0 The width in pixels.
 *     @type int $1 The height in pixels.
 * }
 * @param string $image_src     The &#039;src&#039; of the image.
 * @param array  $image_meta    The image meta data as returned by &#039;wp_get_attachment_metadata()&#039;.
 * @param int    $attachment_id Optional. The image attachment ID. Default 0.
 * @return string|false The &#039;srcset&#039; attribute value. False on error or when only one source exists.
 */
function wp_calculate_image_srcset( $size_array, $image_src, $image_meta, $attachment_id = 0 ) {
	/**
	 * Pre-filters the image meta to be able to fix inconsistencies in the stored data.
	 *
	 * @since 4.5.0
	 *
	 * @param array  $image_meta    The image meta data as returned by &#039;wp_get_attachment_metadata()&#039;.
	 * @param int[]  $size_array    {
	 *     An array of requested width and height values.
	 *
	 *     @type int $0 The width in pixels.
	 *     @type int $1 The height in pixels.
	 * }
	 * @param string $image_src     The &#039;src&#039; of the image.
	 * @param int    $attachment_id The image attachment ID or 0 if not supplied.
	 */
	$image_meta = apply_filters( &#039;wp_calculate_image_srcset_meta&#039;, $image_meta, $size_array, $image_src, $attachment_id );

	if ( empty( $image_meta[&#039;sizes&#039;] ) || ! isset( $image_meta[&#039;file&#039;] ) || strlen( $image_meta[&#039;file&#039;] ) &lt; 4 ) {
		return false;
	}

	$image_sizes = $image_meta[&#039;sizes&#039;];

	// Get the width and height of the image.
	$image_width  = (int) $size_array[0];
	$image_height = (int) $size_array[1];

	// Bail early if error/no width.
	if ( $image_width &lt; 1 ) {
		return false;
	}

	$image_basename = wp_basename( $image_meta[&#039;file&#039;] );

	/*
	 * WordPress flattens animated GIFs into one frame when generating intermediate sizes.
	 * To avoid hiding animation in user content, if src is a full size GIF, a srcset attribute is not generated.
	 * If src is an intermediate size GIF, the full size is excluded from srcset to keep a flattened GIF from becoming animated.
	 */
	if ( ! isset( $image_sizes[&#039;thumbnail&#039;][&#039;mime-type&#039;] ) || &#039;image/gif&#039; !== $image_sizes[&#039;thumbnail&#039;][&#039;mime-type&#039;] ) {
		$image_sizes[] = array(
			&#039;width&#039;  =&gt; $image_meta[&#039;width&#039;],
			&#039;height&#039; =&gt; $image_meta[&#039;height&#039;],
			&#039;file&#039;   =&gt; $image_basename,
		);
	} elseif ( str_contains( $image_src, $image_meta[&#039;file&#039;] ) ) {
		return false;
	}

	// Retrieve the uploads sub-directory from the full size image.
	$dirname = _wp_get_attachment_relative_path( $image_meta[&#039;file&#039;] );

	if ( $dirname ) {
		$dirname = trailingslashit( $dirname );
	}

	$upload_dir    = wp_get_upload_dir();
	$image_baseurl = trailingslashit( $upload_dir[&#039;baseurl&#039;] ) . $dirname;

	/*
	 * If currently on HTTPS, prefer HTTPS URLs when we know they&#039;re supported by the domain
	 * (which is to say, when they share the domain name of the current request).
	 */
	if ( is_ssl() &amp;&amp; ! str_starts_with( $image_baseurl, &#039;https&#039; ) &amp;&amp; parse_url( $image_baseurl, PHP_URL_HOST ) === $_SERVER[&#039;HTTP_HOST&#039;] ) {
		$image_baseurl = set_url_scheme( $image_baseurl, &#039;https&#039; );
	}

	/*
	 * Images that have been edited in WordPress after being uploaded will
	 * contain a unique hash. Look for that hash and use it later to filter
	 * out images that are leftovers from previous versions.
	 */
	$image_edited = preg_match( &#039;/-e[0-9]{13}/&#039;, wp_basename( $image_src ), $image_edit_hash );

	/**
	 * Filters the maximum image width to be included in a &#039;srcset&#039; attribute.
	 *
	 * @since 4.4.0
	 *
	 * @param int   $max_width  The maximum image width to be included in the &#039;srcset&#039;. Default &#039;2048&#039;.
	 * @param int[] $size_array {
	 *     An array of requested width and height values.
	 *
	 *     @type int $0 The width in pixels.
	 *     @type int $1 The height in pixels.
	 * }
	 */
	$max_srcset_image_width = apply_filters( &#039;max_srcset_image_width&#039;, 2048, $size_array );

	// Array to hold URL candidates.
	$sources = array();

	/**
	 * To make sure the ID matches our image src, we will check to see if any sizes in our attachment
	 * meta match our $image_src. If no matches are found we don&#039;t return a srcset to avoid serving
	 * an incorrect image. See #35045.
	 */
	$src_matched = false;

	/*
	 * Loop through available images. Only use images that are resized
	 * versions of the same edit.
	 */
	foreach ( $image_sizes as $image ) {
		$is_src = false;

		// Check if image meta isn&#039;t corrupted.
		if ( ! is_array( $image ) ) {
			continue;
		}

		// If the file name is part of the `src`, we&#039;ve confirmed a match.
		if ( ! $src_matched &amp;&amp; str_contains( $image_src, $dirname . $image[&#039;file&#039;] ) ) {
			$src_matched = true;
			$is_src      = true;
		}

		// Filter out images that are from previous edits.
		if ( $image_edited &amp;&amp; ! strpos( $image[&#039;file&#039;], $image_edit_hash[0] ) ) {
			continue;
		}

		/*
		 * Filters out images that are wider than &#039;$max_srcset_image_width&#039; unless
		 * that file is in the &#039;src&#039; attribute.
		 */
		if ( $max_srcset_image_width &amp;&amp; $image[&#039;width&#039;] &gt; $max_srcset_image_width &amp;&amp; ! $is_src ) {
			continue;
		}

		// If the image dimensions are within 1px of the expected size, use it.
		if ( wp_image_matches_ratio( $image_width, $image_height, $image[&#039;width&#039;], $image[&#039;height&#039;] ) ) {
			// Add the URL, descriptor, and value to the sources array to be returned.
			$source = array(
				&#039;url&#039;        =&gt; $image_baseurl . $image[&#039;file&#039;],
				&#039;descriptor&#039; =&gt; &#039;w&#039;,
				&#039;value&#039;      =&gt; $image[&#039;width&#039;],
			);

			// The &#039;src&#039; image has to be the first in the &#039;srcset&#039;, because of a bug in iOS8. See #35030.
			if ( $is_src ) {
				$sources = array( $image[&#039;width&#039;] =&gt; $source ) + $sources;
			} else {
				$sources[ $image[&#039;width&#039;] ] = $source;
			}
		}
	}

	/**
	 * Filters an image&#039;s &#039;srcset&#039; sources.
	 *
	 * @since 4.4.0
	 *
	 * @param array  $sources {
	 *     One or more arrays of source data to include in the &#039;srcset&#039;.
	 *
	 *     @type array $width {
	 *         @type string $url        The URL of an image source.
	 *         @type string $descriptor The descriptor type used in the image candidate string,
	 *                                  either &#039;w&#039; or &#039;x&#039;.
	 *         @type int    $value      The source width if paired with a &#039;w&#039; descriptor, or a
	 *                                  pixel density value if paired with an &#039;x&#039; descriptor.
	 *     }
	 * }
	 * @param array $size_array     {
	 *     An array of requested width and height values.
	 *
	 *     @type int $0 The width in pixels.
	 *     @type int $1 The height in pixels.
	 * }
	 * @param string $image_src     The &#039;src&#039; of the image.
	 * @param array  $image_meta    The image meta data as returned by &#039;wp_get_attachment_metadata()&#039;.
	 * @param int    $attachment_id Image attachment ID or 0.
	 */
	$sources = apply_filters( &#039;wp_calculate_image_srcset&#039;, $sources, $size_array, $image_src, $image_meta, $attachment_id );

	// Only return a &#039;srcset&#039; value if there is more than one source.
	if ( ! $src_matched || ! is_array( $sources ) || count( $sources ) &lt; 2 ) {
		return false;
	}

	$srcset = &#039;&#039;;

	foreach ( $sources as $source ) {
		$srcset .= str_replace( &#039; &#039;, &#039;%20&#039;, $source[&#039;url&#039;] ) . &#039; &#039; . $source[&#039;value&#039;] . $source[&#039;descriptor&#039;] . &#039;, &#039;;
	}

	return rtrim( $srcset, &#039;, &#039; );
}

/**
 * Retrieves the value for an image attachment&#039;s &#039;sizes&#039; attribute.
 *
 * @since 4.4.0
 *
 * @see wp_calculate_image_sizes()
 *
 * @param int          $attachment_id Image attachment ID.
 * @param string|int[] $size          Optional. Image size. Accepts any registered image size name, or an array of
 *                                    width and height values in pixels (in that order). Default &#039;medium&#039;.
 * @param array        $image_meta    Optional. The image meta data as returned by &#039;wp_get_attachment_metadata()&#039;.
 *                                    Default null.
 * @return string|false A valid source size value for use in a &#039;sizes&#039; attribute or false.
 */
function wp_get_attachment_image_sizes( $attachment_id, $size = &#039;medium&#039;, $image_meta = null ) {
	$image = wp_get_attachment_image_src( $attachment_id, $size );

	if ( ! $image ) {
		return false;
	}

	if ( ! is_array( $image_meta ) ) {
		$image_meta = wp_get_attachment_metadata( $attachment_id );
	}

	$image_src  = $image[0];
	$size_array = array(
		absint( $image[1] ),
		absint( $image[2] ),
	);

	return wp_calculate_image_sizes( $size_array, $image_src, $image_meta, $attachment_id );
}

/**
 * Creates a &#039;sizes&#039; attribute value for an image.
 *
 * @since 4.4.0
 *
 * @param string|int[] $size          Image size. Accepts any registered image size name, or an array of
 *                                    width and height values in pixels (in that order).
 * @param string       $image_src     Optional. The URL to the image file. Default null.
 * @param array        $image_meta    Optional. The image meta data as returned by &#039;wp_get_attachment_metadata()&#039;.
 *                                    Default null.
 * @param int          $attachment_id Optional. Image attachment ID. Either `$image_meta` or `$attachment_id`
 *                                    is needed when using the image size name as argument for `$size`. Default 0.
 * @return string|false A valid source size value for use in a &#039;sizes&#039; attribute or false.
 */
function wp_calculate_image_sizes( $size, $image_src = null, $image_meta = null, $attachment_id = 0 ) {
	$width = 0;

	if ( is_array( $size ) ) {
		$width = absint( $size[0] );
	} elseif ( is_string( $size ) ) {
		if ( ! $image_meta &amp;&amp; $attachment_id ) {
			$image_meta = wp_get_attachment_metadata( $attachment_id );
		}

		if ( is_array( $image_meta ) ) {
			$size_array = _wp_get_image_size_from_meta( $size, $image_meta );
			if ( $size_array ) {
				$width = absint( $size_array[0] );
			}
		}
	}

	if ( ! $width ) {
		return false;
	}

	// Setup the default &#039;sizes&#039; attribute.
	$sizes = sprintf( &#039;(max-width: %1$dpx) 100vw, %1$dpx&#039;, $width );

	/**
	 * Filters the output of &#039;wp_calculate_image_sizes()&#039;.
	 *
	 * @since 4.4.0
	 *
	 * @param string       $sizes         A source size value for use in a &#039;sizes&#039; attribute.
	 * @param string|int[] $size          Requested image size. Can be any registered image size name, or
	 *                                    an array of width and height values in pixels (in that order).
	 * @param string|null  $image_src     The URL to the image file or null.
	 * @param array|null   $image_meta    The image meta data as returned by wp_get_attachment_metadata() or null.
	 * @param int          $attachment_id Image attachment ID of the original image or 0.
	 */
	return apply_filters( &#039;wp_calculate_image_sizes&#039;, $sizes, $size, $image_src, $image_meta, $attachment_id );
}

/**
 * Determines if the image meta data is for the image source file.
 *
 * The image meta data is retrieved by attachment post ID. In some cases the post IDs may change.
 * For example when the website is exported and imported at another website. Then the
 * attachment post IDs that are in post_content for the exported website may not match
 * the same attachments at the new website.
 *
 * @since 5.5.0
 *
 * @param string $image_location The full path or URI to the image file.
 * @param array  $image_meta     The attachment meta data as returned by &#039;wp_get_attachment_metadata()&#039;.
 * @param int    $attachment_id  Optional. The image attachment ID. Default 0.
 * @return bool Whether the image meta is for this image file.
 */
function wp_image_file_matches_image_meta( $image_location, $image_meta, $attachment_id = 0 ) {
	$match = false;

	// Ensure the $image_meta is valid.
	if ( isset( $image_meta[&#039;file&#039;] ) &amp;&amp; strlen( $image_meta[&#039;file&#039;] ) &gt; 4 ) {
		// Remove query args in image URI.
		list( $image_location ) = explode( &#039;?&#039;, $image_location );

		// Check if the relative image path from the image meta is at the end of $image_location.
		if ( strrpos( $image_location, $image_meta[&#039;file&#039;] ) === strlen( $image_location ) - strlen( $image_meta[&#039;file&#039;] ) ) {
			$match = true;
		} else {
			// Retrieve the uploads sub-directory from the full size image.
			$dirname = _wp_get_attachment_relative_path( $image_meta[&#039;file&#039;] );

			if ( $dirname ) {
				$dirname = trailingslashit( $dirname );
			}

			if ( ! empty( $image_meta[&#039;original_image&#039;] ) ) {
				$relative_path = $dirname . $image_meta[&#039;original_image&#039;];

				if ( strrpos( $image_location, $relative_path ) === strlen( $image_location ) - strlen( $relative_path ) ) {
					$match = true;
				}
			}

			if ( ! $match &amp;&amp; ! empty( $image_meta[&#039;sizes&#039;] ) ) {
				foreach ( $image_meta[&#039;sizes&#039;] as $image_size_data ) {
					$relative_path = $dirname . $image_size_data[&#039;file&#039;];

					if ( strrpos( $image_location, $relative_path ) === strlen( $image_location ) - strlen( $relative_path ) ) {
						$match = true;
						break;
					}
				}
			}
		}
	}

	/**
	 * Filters whether an image path or URI matches image meta.
	 *
	 * @since 5.5.0
	 *
	 * @param bool   $match          Whether the image relative path from the image meta
	 *                               matches the end of the URI or path to the image file.
	 * @param string $image_location Full path or URI to the tested image file.
	 * @param array  $image_meta     The image meta data as returned by &#039;wp_get_attachment_metadata()&#039;.
	 * @param int    $attachment_id  The image attachment ID or 0 if not supplied.
	 */
	return apply_filters( &#039;wp_image_file_matches_image_meta&#039;, $match, $image_location, $image_meta, $attachment_id );
}

/**
 * Determines an image&#039;s width and height dimensions based on the source file.
 *
 * @since 5.5.0
 *
 * @param string $image_src     The image source file.
 * @param array  $image_meta    The image meta data as returned by &#039;wp_get_attachment_metadata()&#039;.
 * @param int    $attachment_id Optional. The image attachment ID. Default 0.
 * @return array|false Array with first element being the width and second element being the height,
 *                     or false if dimensions cannot be determined.
 */
function wp_image_src_get_dimensions( $image_src, $image_meta, $attachment_id = 0 ) {
	$dimensions = false;

	// Is it a full size image?
	if (
		isset( $image_meta[&#039;file&#039;] ) &amp;&amp;
		str_contains( $image_src, wp_basename( $image_meta[&#039;file&#039;] ) )
	) {
		$dimensions = array(
			(int) $image_meta[&#039;width&#039;],
			(int) $image_meta[&#039;height&#039;],
		);
	}

	if ( ! $dimensions &amp;&amp; ! empty( $image_meta[&#039;sizes&#039;] ) ) {
		$src_filename = wp_basename( $image_src );

		foreach ( $image_meta[&#039;sizes&#039;] as $image_size_data ) {
			if ( $src_filename === $image_size_data[&#039;file&#039;] ) {
				$dimensions = array(
					(int) $image_size_data[&#039;width&#039;],
					(int) $image_size_data[&#039;height&#039;],
				);

				break;
			}
		}
	}

	/**
	 * Filters the &#039;wp_image_src_get_dimensions&#039; value.
	 *
	 * @since 5.7.0
	 *
	 * @param array|false $dimensions    Array with first element being the width
	 *                                   and second element being the height, or
	 *                                   false if dimensions could not be determined.
	 * @param string      $image_src     The image source file.
	 * @param array       $image_meta    The image meta data as returned by
	 *                                   &#039;wp_get_attachment_metadata()&#039;.
	 * @param int         $attachment_id The image attachment ID. Default 0.
	 */
	return apply_filters( &#039;wp_image_src_get_dimensions&#039;, $dimensions, $image_src, $image_meta, $attachment_id );
}

/**
 * Adds &#039;srcset&#039; and &#039;sizes&#039; attributes to an existing &#039;img&#039; element.
 *
 * @since 4.4.0
 *
 * @see wp_calculate_image_srcset()
 * @see wp_calculate_image_sizes()
 *
 * @param string $image         An HTML &#039;img&#039; element to be filtered.
 * @param array  $image_meta    The image meta data as returned by &#039;wp_get_attachment_metadata()&#039;.
 * @param int    $attachment_id Image attachment ID.
 * @return string Converted &#039;img&#039; element with &#039;srcset&#039; and &#039;sizes&#039; attributes added.
 */
function wp_image_add_srcset_and_sizes( $image, $image_meta, $attachment_id ) {
	// Ensure the image meta exists.
	if ( empty( $image_meta[&#039;sizes&#039;] ) ) {
		return $image;
	}

	$image_src         = preg_match( &#039;/src=&quot;([^&quot;]+)&quot;/&#039;, $image, $match_src ) ? $match_src[1] : &#039;&#039;;
	list( $image_src ) = explode( &#039;?&#039;, $image_src );

	// Return early if we couldn&#039;t get the image source.
	if ( ! $image_src ) {
		return $image;
	}

	// Bail early if an image has been inserted and later edited.
	if ( preg_match( &#039;/-e[0-9]{13}/&#039;, $image_meta[&#039;file&#039;], $img_edit_hash ) &amp;&amp;
		 ! str_contains( wp_basename( $image_src ), $img_edit_hash[0] ) ) {

		return $image;
	}

	$width  = preg_match( &#039;/ width=&quot;([0-9]+)&quot;/&#039;, $image, $match_width ) ? (int) $match_width[1] : 0;
	$height = preg_match( &#039;/ height=&quot;([0-9]+)&quot;/&#039;, $image, $match_height ) ? (int) $match_height[1] : 0;

	if ( $width &amp;&amp; $height ) {
		$size_array = array( $width, $height );
	} else {
		$size_array = wp_image_src_get_dimensions( $image_src, $image_meta, $attachment_id );
		if ( ! $size_array ) {
			return $image;
		}
	}

	$srcset = wp_calculate_image_srcset( $size_array, $image_src, $image_meta, $attachment_id );

	if ( $srcset ) {
		// Check if there is already a &#039;sizes&#039; attribute.
		$sizes = strpos( $image, &#039; sizes=&#039; );

		if ( ! $sizes ) {
			$sizes = wp_calculate_image_sizes( $size_array, $image_src, $image_meta, $attachment_id );
		}
	}

	if ( $srcset &amp;&amp; $sizes ) {
		// Format the &#039;srcset&#039; and &#039;sizes&#039; string and escape attributes.
		$attr = sprintf( &#039; srcset=&quot;%s&quot;&#039;, esc_attr( $srcset ) );

		if ( is_string( $sizes ) ) {
			$attr .= sprintf( &#039; sizes=&quot;%s&quot;&#039;, esc_attr( $sizes ) );
		}

		// Add the srcset and sizes attributes to the image markup.
		return preg_replace( &#039;/&lt;img ([^&gt;]+?)[\/ ]*&gt;/&#039;, &#039;&lt;img $1&#039; . $attr . &#039; /&gt;&#039;, $image );
	}

	return $image;
}

/**
 * Determines whether to add the `loading` attribute to the specified tag in the specified context.
 *
 * @since 5.5.0
 * @since 5.7.0 Now returns `true` by default for `iframe` tags.
 *
 * @param string $tag_name The tag name.
 * @param string $context  Additional context, like the current filter name
 *                         or the function name from where this was called.
 * @return bool Whether to add the attribute.
 */
function wp_lazy_loading_enabled( $tag_name, $context ) {
	/*
	 * By default add to all &#039;img&#039; and &#039;iframe&#039; tags.
	 * See https://html.spec.whatwg.org/multipage/embedded-content.html#attr-img-loading
	 * See https://html.spec.whatwg.org/multipage/iframe-embed-object.html#attr-iframe-loading
	 */
	$default = ( &#039;img&#039; === $tag_name || &#039;iframe&#039; === $tag_name );

	/**
	 * Filters whether to add the `loading` attribute to the specified tag in the specified context.
	 *
	 * @since 5.5.0
	 *
	 * @param bool   $default  Default value.
	 * @param string $tag_name The tag name.
	 * @param string $context  Additional context, like the current filter name
	 *                         or the function name from where this was called.
	 */
	return (bool) apply_filters( &#039;wp_lazy_loading_enabled&#039;, $default, $tag_name, $context );
}

/**
 * Filters specific tags in post content and modifies their markup.
 *
 * Modifies HTML tags in post content to include new browser and HTML technologies
 * that may not have existed at the time of post creation. These modifications currently
 * include adding `srcset`, `sizes`, and `loading` attributes to `img` HTML tags, as well
 * as adding `loading` attributes to `iframe` HTML tags.
 * Future similar optimizations should be added/expected here.
 *
 * @since 5.5.0
 * @since 5.7.0 Now supports adding `loading` attributes to `iframe` tags.
 *
 * @see wp_img_tag_add_width_and_height_attr()
 * @see wp_img_tag_add_srcset_and_sizes_attr()
 * @see wp_img_tag_add_loading_optimization_attrs()
 * @see wp_iframe_tag_add_loading_attr()
 *
 * @param string $content The HTML content to be filtered.
 * @param string $context Optional. Additional context to pass to the filters.
 *                        Defaults to `current_filter()` when not set.
 * @return string Converted content with images modified.
 */
function wp_filter_content_tags( $content, $context = null ) {
	if ( null === $context ) {
		$context = current_filter();
	}

	$add_iframe_loading_attr = wp_lazy_loading_enabled( &#039;iframe&#039;, $context );

	if ( ! preg_match_all( &#039;/&lt;(img|iframe)\s[^&gt;]+&gt;/&#039;, $content, $matches, PREG_SET_ORDER ) ) {
		return $content;
	}

	// List of the unique `img` tags found in $content.
	$images = array();

	// List of the unique `iframe` tags found in $content.
	$iframes = array();

	foreach ( $matches as $match ) {
		list( $tag, $tag_name ) = $match;

		switch ( $tag_name ) {
			case &#039;img&#039;:
				if ( preg_match( &#039;/wp-image-([0-9]+)/i&#039;, $tag, $class_id ) ) {
					$attachment_id = absint( $class_id[1] );

					if ( $attachment_id ) {
						/*
						 * If exactly the same image tag is used more than once, overwrite it.
						 * All identical tags will be replaced later with &#039;str_replace()&#039;.
						 */
						$images[ $tag ] = $attachment_id;
						break;
					}
				}
				$images[ $tag ] = 0;
				break;
			case &#039;iframe&#039;:
				$iframes[ $tag ] = 0;
				break;
		}
	}

	// Reduce the array to unique attachment IDs.
	$attachment_ids = array_unique( array_filter( array_values( $images ) ) );

	if ( count( $attachment_ids ) &gt; 1 ) {
		/*
		 * Warm the object cache with post and meta information for all found
		 * images to avoid making individual database calls.
		 */
		_prime_post_caches( $attachment_ids, false, true );
	}

	// Iterate through the matches in order of occurrence as it is relevant for whether or not to lazy-load.
	foreach ( $matches as $match ) {
		// Filter an image match.
		if ( isset( $images[ $match[0] ] ) ) {
			$filtered_image = $match[0];
			$attachment_id  = $images[ $match[0] ];

			// Add &#039;width&#039; and &#039;height&#039; attributes if applicable.
			if ( $attachment_id &gt; 0 &amp;&amp; ! str_contains( $filtered_image, &#039; width=&#039; ) &amp;&amp; ! str_contains( $filtered_image, &#039; height=&#039; ) ) {
				$filtered_image = wp_img_tag_add_width_and_height_attr( $filtered_image, $context, $attachment_id );
			}

			// Add &#039;srcset&#039; and &#039;sizes&#039; attributes if applicable.
			if ( $attachment_id &gt; 0 &amp;&amp; ! str_contains( $filtered_image, &#039; srcset=&#039; ) ) {
				$filtered_image = wp_img_tag_add_srcset_and_sizes_attr( $filtered_image, $context, $attachment_id );
			}

			// Add loading optimization attributes if applicable.
			$filtered_image = wp_img_tag_add_loading_optimization_attrs( $filtered_image, $context );

			// Add &#039;decoding=async&#039; attribute unless a &#039;decoding&#039; attribute is already present.
			if ( ! str_contains( $filtered_image, &#039; decoding=&#039; ) ) {
				$filtered_image = wp_img_tag_add_decoding_attr( $filtered_image, $context );
			}

			/**
			 * Filters an img tag within the content for a given context.
			 *
			 * @since 6.0.0
			 *
			 * @param string $filtered_image Full img tag with attributes that will replace the source img tag.
			 * @param string $context        Additional context, like the current filter name or the function name from where this was called.
			 * @param int    $attachment_id  The image attachment ID. May be 0 in case the image is not an attachment.
			 */
			$filtered_image = apply_filters( &#039;wp_content_img_tag&#039;, $filtered_image, $context, $attachment_id );

			if ( $filtered_image !== $match[0] ) {
				$content = str_replace( $match[0], $filtered_image, $content );
			}

			/*
			 * Unset image lookup to not run the same logic again unnecessarily if the same image tag is used more than
			 * once in the same blob of content.
			 */
			unset( $images[ $match[0] ] );
		}

		// Filter an iframe match.
		if ( isset( $iframes[ $match[0] ] ) ) {
			$filtered_iframe = $match[0];

			// Add &#039;loading&#039; attribute if applicable.
			if ( $add_iframe_loading_attr &amp;&amp; ! str_contains( $filtered_iframe, &#039; loading=&#039; ) ) {
				$filtered_iframe = wp_iframe_tag_add_loading_attr( $filtered_iframe, $context );
			}

			if ( $filtered_iframe !== $match[0] ) {
				$content = str_replace( $match[0], $filtered_iframe, $content );
			}

			/*
			 * Unset iframe lookup to not run the same logic again unnecessarily if the same iframe tag is used more
			 * than once in the same blob of content.
			 */
			unset( $iframes[ $match[0] ] );
		}
	}

	return $content;
}

/**
 * Adds optimization attributes to an `img` HTML tag.
 *
 * @since 6.3.0
 *
 * @param string $image   The HTML `img` tag where the attribute should be added.
 * @param string $context Additional context to pass to the filters.
 * @return string Converted `img` tag with optimization attributes added.
 */
function wp_img_tag_add_loading_optimization_attrs( $image, $context ) {
	$width             = preg_match( &#039;/ width=[&quot;\&#039;]([0-9]+)[&quot;\&#039;]/&#039;, $image, $match_width ) ? (int) $match_width[1] : null;
	$height            = preg_match( &#039;/ height=[&quot;\&#039;]([0-9]+)[&quot;\&#039;]/&#039;, $image, $match_height ) ? (int) $match_height[1] : null;
	$loading_val       = preg_match( &#039;/ loading=[&quot;\&#039;]([A-Za-z]+)[&quot;\&#039;]/&#039;, $image, $match_loading ) ? $match_loading[1] : null;
	$fetchpriority_val = preg_match( &#039;/ fetchpriority=[&quot;\&#039;]([A-Za-z]+)[&quot;\&#039;]/&#039;, $image, $match_fetchpriority ) ? $match_fetchpriority[1] : null;

	/*
	 * Get loading optimization attributes to use.
	 * This must occur before the conditional check below so that even images
	 * that are ineligible for being lazy-loaded are considered.
	 */
	$optimization_attrs = wp_get_loading_optimization_attributes(
		&#039;img&#039;,
		array(
			&#039;width&#039;         =&gt; $width,
			&#039;height&#039;        =&gt; $height,
			&#039;loading&#039;       =&gt; $loading_val,
			&#039;fetchpriority&#039; =&gt; $fetchpriority_val,
		),
		$context
	);

	// Images should have source and dimension attributes for the loading optimization attributes to be added.
	if ( ! str_contains( $image, &#039; src=&quot;&#039; ) || ! str_contains( $image, &#039; width=&quot;&#039; ) || ! str_contains( $image, &#039; height=&quot;&#039; ) ) {
		return $image;
	}

	// Retained for backward compatibility.
	$loading_attrs_enabled = wp_lazy_loading_enabled( &#039;img&#039;, $context );

	if ( empty( $loading_val ) &amp;&amp; $loading_attrs_enabled ) {
		/**
		 * Filters the `loading` attribute value to add to an image. Default `lazy`.
		 *
		 * Returning `false` or an empty string will not add the attribute.
		 * Returning `true` will add the default value.
		 *
		 * @since 5.5.0
		 *
		 * @param string|bool $value   The `loading` attribute value. Returning a falsey value will result in
		 *                             the attribute being omitted for the image.
		 * @param string      $image   The HTML `img` tag to be filtered.
		 * @param string      $context Additional context about how the function was called or where the img tag is.
		 */
		$filtered_loading_attr = apply_filters(
			&#039;wp_img_tag_add_loading_attr&#039;,
			isset( $optimization_attrs[&#039;loading&#039;] ) ? $optimization_attrs[&#039;loading&#039;] : false,
			$image,
			$context
		);

		// Validate the values after filtering.
		if ( isset( $optimization_attrs[&#039;loading&#039;] ) &amp;&amp; ! $filtered_loading_attr ) {
			// Unset `loading` attributes if `$filtered_loading_attr` is set to `false`.
			unset( $optimization_attrs[&#039;loading&#039;] );
		} elseif ( in_array( $filtered_loading_attr, array( &#039;lazy&#039;, &#039;eager&#039; ), true ) ) {
			/*
			 * If the filter changed the loading attribute to &quot;lazy&quot; when a fetchpriority attribute
			 * with value &quot;high&quot; is already present, trigger a warning since those two attribute
			 * values should be mutually exclusive.
			 *
			 * The same warning is present in `wp_get_loading_optimization_attributes()`, and here it
			 * is only intended for the specific scenario where the above filtered caused the problem.
			 */
			if ( isset( $optimization_attrs[&#039;fetchpriority&#039;] ) &amp;&amp; &#039;high&#039; === $optimization_attrs[&#039;fetchpriority&#039;] &amp;&amp;
				( isset( $optimization_attrs[&#039;loading&#039;] ) ? $optimization_attrs[&#039;loading&#039;] : false ) !== $filtered_loading_attr &amp;&amp;
				&#039;lazy&#039; === $filtered_loading_attr
			) {
				_doing_it_wrong(
					__FUNCTION__,
					__( &#039;An image should not be lazy-loaded and marked as high priority at the same time.&#039; ),
					&#039;6.3.0&#039;
				);
			}

			// The filtered value will still be respected.
			$optimization_attrs[&#039;loading&#039;] = $filtered_loading_attr;
		}

		if ( ! empty( $optimization_attrs[&#039;loading&#039;] ) ) {
			$image = str_replace( &#039;&lt;img&#039;, &#039;&lt;img loading=&quot;&#039; . esc_attr( $optimization_attrs[&#039;loading&#039;] ) . &#039;&quot;&#039;, $image );
		}
	}

	if ( empty( $fetchpriority_val ) &amp;&amp; ! empty( $optimization_attrs[&#039;fetchpriority&#039;] ) ) {
		$image = str_replace( &#039;&lt;img&#039;, &#039;&lt;img fetchpriority=&quot;&#039; . esc_attr( $optimization_attrs[&#039;fetchpriority&#039;] ) . &#039;&quot;&#039;, $image );
	}

	return $image;
}

/**
 * Adds `decoding` attribute to an `img` HTML tag.
 *
 * The `decoding` attribute allows developers to indicate whether the
 * browser can decode the image off the main thread (`async`), on the
 * main thread (`sync`) or as determined by the browser (`auto`).
 *
 * By default WordPress adds `decoding=&quot;async&quot;` to images but developers
 * can use the {@see &#039;wp_img_tag_add_decoding_attr&#039;} filter to modify this
 * to remove the attribute or set it to another accepted value.
 *
 * @since 6.1.0
 *
 * @param string $image   The HTML `img` tag where the attribute should be added.
 * @param string $context Additional context to pass to the filters.
 *
 * @return string Converted `img` tag with `decoding` attribute added.
 */
function wp_img_tag_add_decoding_attr( $image, $context ) {
	/*
	 * Only apply the decoding attribute to images that have a src attribute that
	 * starts with a double quote, ensuring escaped JSON is also excluded.
	 */
	if ( ! str_contains( $image, &#039; src=&quot;&#039; ) ) {
		return $image;
	}

	/**
	 * Filters the `decoding` attribute value to add to an image. Default `async`.
	 *
	 * Returning a falsey value will omit the attribute.
	 *
	 * @since 6.1.0
	 *
	 * @param string|false|null $value   The `decoding` attribute value. Returning a falsey value
	 *                                   will result in the attribute being omitted for the image.
	 *                                   Otherwise, it may be: &#039;async&#039; (default), &#039;sync&#039;, or &#039;auto&#039;.
	 * @param string            $image   The HTML `img` tag to be filtered.
	 * @param string            $context Additional context about how the function was called
	 *                                   or where the img tag is.
	 */
	$value = apply_filters( &#039;wp_img_tag_add_decoding_attr&#039;, &#039;async&#039;, $image, $context );

	if ( in_array( $value, array( &#039;async&#039;, &#039;sync&#039;, &#039;auto&#039; ), true ) ) {
		$image = str_replace( &#039;&lt;img &#039;, &#039;&lt;img decoding=&quot;&#039; . esc_attr( $value ) . &#039;&quot; &#039;, $image );
	}

	return $image;
}

/**
 * Adds `width` and `height` attributes to an `img` HTML tag.
 *
 * @since 5.5.0
 *
 * @param string $image         The HTML `img` tag where the attribute should be added.
 * @param string $context       Additional context to pass to the filters.
 * @param int    $attachment_id Image attachment ID.
 * @return string Converted &#039;img&#039; element with &#039;width&#039; and &#039;height&#039; attributes added.
 */
function wp_img_tag_add_width_and_height_attr( $image, $context, $attachment_id ) {
	$image_src         = preg_match( &#039;/src=&quot;([^&quot;]+)&quot;/&#039;, $image, $match_src ) ? $match_src[1] : &#039;&#039;;
	list( $image_src ) = explode( &#039;?&#039;, $image_src );

	// Return early if we couldn&#039;t get the image source.
	if ( ! $image_src ) {
		return $image;
	}

	/**
	 * Filters whether to add the missing `width` and `height` HTML attributes to the img tag. Default `true`.
	 *
	 * Returning anything else than `true` will not add the attributes.
	 *
	 * @since 5.5.0
	 *
	 * @param bool   $value         The filtered value, defaults to `true`.
	 * @param string $image         The HTML `img` tag where the attribute should be added.
	 * @param string $context       Additional context about how the function was called or where the img tag is.
	 * @param int    $attachment_id The image attachment ID.
	 */
	$add = apply_filters( &#039;wp_img_tag_add_width_and_height_attr&#039;, true, $image, $context, $attachment_id );

	if ( true === $add ) {
		$image_meta = wp_get_attachment_metadata( $attachment_id );
		$size_array = wp_image_src_get_dimensions( $image_src, $image_meta, $attachment_id );

		if ( $size_array ) {
			$hw = trim( image_hwstring( $size_array[0], $size_array[1] ) );
			return str_replace( &#039;&lt;img&#039;, &quot;&lt;img {$hw}&quot;, $image );
		}
	}

	return $image;
}

/**
 * Adds `srcset` and `sizes` attributes to an existing `img` HTML tag.
 *
 * @since 5.5.0
 *
 * @param string $image         The HTML `img` tag where the attribute should be added.
 * @param string $context       Additional context to pass to the filters.
 * @param int    $attachment_id Image attachment ID.
 * @return string Converted &#039;img&#039; element with &#039;loading&#039; attribute added.
 */
function wp_img_tag_add_srcset_and_sizes_attr( $image, $context, $attachment_id ) {
	/**
	 * Filters whether to add the `srcset` and `sizes` HTML attributes to the img tag. Default `true`.
	 *
	 * Returning anything else than `true` will not add the attributes.
	 *
	 * @since 5.5.0
	 *
	 * @param bool   $value         The filtered value, defaults to `true`.
	 * @param string $image         The HTML `img` tag where the attribute should be added.
	 * @param string $context       Additional context about how the function was called or where the img tag is.
	 * @param int    $attachment_id The image attachment ID.
	 */
	$add = apply_filters( &#039;wp_img_tag_add_srcset_and_sizes_attr&#039;, true, $image, $context, $attachment_id );

	if ( true === $add ) {
		$image_meta = wp_get_attachment_metadata( $attachment_id );
		return wp_image_add_srcset_and_sizes( $image, $image_meta, $attachment_id );
	}

	return $image;
}

/**
 * Adds `loading` attribute to an `iframe` HTML tag.
 *
 * @since 5.7.0
 *
 * @param string $iframe  The HTML `iframe` tag where the attribute should be added.
 * @param string $context Additional context to pass to the filters.
 * @return string Converted `iframe` tag with `loading` attribute added.
 */
function wp_iframe_tag_add_loading_attr( $iframe, $context ) {
	/*
	 * Iframes with fallback content (see `wp_filter_oembed_result()`) should not be lazy-loaded because they are
	 * visually hidden initially.
	 */
	if ( str_contains( $iframe, &#039; data-secret=&quot;&#039; ) ) {
		return $iframe;
	}

	/*
	 * Get loading attribute value to use. This must occur before the conditional check below so that even iframes that
	 * are ineligible for being lazy-loaded are considered.
	 */
	$optimization_attrs = wp_get_loading_optimization_attributes(
		&#039;iframe&#039;,
		array(
			/*
			 * The concrete values for width and height are not important here for now
			 * since fetchpriority is not yet supported for iframes.
			 * TODO: Use WP_HTML_Tag_Processor to extract actual values once support is
			 * added.
			 */
			&#039;width&#039;   =&gt; str_contains( $iframe, &#039; width=&quot;&#039; ) ? 100 : null,
			&#039;height&#039;  =&gt; str_contains( $iframe, &#039; height=&quot;&#039; ) ? 100 : null,
			// This function is never called when a &#039;loading&#039; attribute is already present.
			&#039;loading&#039; =&gt; null,
		),
		$context
	);

	// Iframes should have source and dimension attributes for the `loading` attribute to be added.
	if ( ! str_contains( $iframe, &#039; src=&quot;&#039; ) || ! str_contains( $iframe, &#039; width=&quot;&#039; ) || ! str_contains( $iframe, &#039; height=&quot;&#039; ) ) {
		return $iframe;
	}

	$value = isset( $optimization_attrs[&#039;loading&#039;] ) ? $optimization_attrs[&#039;loading&#039;] : false;

	/**
	 * Filters the `loading` attribute value to add to an iframe. Default `lazy`.
	 *
	 * Returning `false` or an empty string will not add the attribute.
	 * Returning `true` will add the default value.
	 *
	 * @since 5.7.0
	 *
	 * @param string|bool $value   The `loading` attribute value. Returning a falsey value will result in
	 *                             the attribute being omitted for the iframe.
	 * @param string      $iframe  The HTML `iframe` tag to be filtered.
	 * @param string      $context Additional context about how the function was called or where the iframe tag is.
	 */
	$value = apply_filters( &#039;wp_iframe_tag_add_loading_attr&#039;, $value, $iframe, $context );

	if ( $value ) {
		if ( ! in_array( $value, array( &#039;lazy&#039;, &#039;eager&#039; ), true ) ) {
			$value = &#039;lazy&#039;;
		}

		return str_replace( &#039;&lt;iframe&#039;, &#039;&lt;iframe loading=&quot;&#039; . esc_attr( $value ) . &#039;&quot;&#039;, $iframe );
	}

	return $iframe;
}

/**
 * Adds a &#039;wp-post-image&#039; class to post thumbnails. Internal use only.
 *
 * Uses the {@see &#039;begin_fetch_post_thumbnail_html&#039;} and {@see &#039;end_fetch_post_thumbnail_html&#039;}
 * action hooks to dynamically add/remove itself so as to only filter post thumbnails.
 *
 * @ignore
 * @since 2.9.0
 *
 * @param string[] $attr Array of thumbnail attributes including src, class, alt, title, keyed by attribute name.
 * @return string[] Modified array of attributes including the new &#039;wp-post-image&#039; class.
 */
function _wp_post_thumbnail_class_filter( $attr ) {
	$attr[&#039;class&#039;] .= &#039; wp-post-image&#039;;
	return $attr;
}

/**
 * Adds &#039;_wp_post_thumbnail_class_filter&#039; callback to the &#039;wp_get_attachment_image_attributes&#039;
 * filter hook. Internal use only.
 *
 * @ignore
 * @since 2.9.0
 *
 * @param string[] $attr Array of thumbnail attributes including src, class, alt, title, keyed by attribute name.
 */
function _wp_post_thumbnail_class_filter_add( $attr ) {
	add_filter( &#039;wp_get_attachment_image_attributes&#039;, &#039;_wp_post_thumbnail_class_filter&#039; );
}

/**
 * Removes the &#039;_wp_post_thumbnail_class_filter&#039; callback from the &#039;wp_get_attachment_image_attributes&#039;
 * filter hook. Internal use only.
 *
 * @ignore
 * @since 2.9.0
 *
 * @param string[] $attr Array of thumbnail attributes including src, class, alt, title, keyed by attribute name.
 */
function _wp_post_thumbnail_class_filter_remove( $attr ) {
	remove_filter( &#039;wp_get_attachment_image_attributes&#039;, &#039;_wp_post_thumbnail_class_filter&#039; );
}

/**
 * Overrides the context used in {@see wp_get_attachment_image()}. Internal use only.
 *
 * Uses the {@see &#039;begin_fetch_post_thumbnail_html&#039;} and {@see &#039;end_fetch_post_thumbnail_html&#039;}
 * action hooks to dynamically add/remove itself so as to only filter post thumbnails.
 *
 * @ignore
 * @since 6.3.0
 * @access private
 *
 * @param string $context The context for rendering an attachment image.
 * @return string Modified context set to &#039;the_post_thumbnail&#039;.
 */
function _wp_post_thumbnail_context_filter( $context ) {
	return &#039;the_post_thumbnail&#039;;
}

/**
 * Adds the &#039;_wp_post_thumbnail_context_filter&#039; callback to the &#039;wp_get_attachment_image_context&#039;
 * filter hook. Internal use only.
 *
 * @ignore
 * @since 6.3.0
 * @access private
 */
function _wp_post_thumbnail_context_filter_add() {
	add_filter( &#039;wp_get_attachment_image_context&#039;, &#039;_wp_post_thumbnail_context_filter&#039; );
}

/**
 * Removes the &#039;_wp_post_thumbnail_context_filter&#039; callback from the &#039;wp_get_attachment_image_context&#039;
 * filter hook. Internal use only.
 *
 * @ignore
 * @since 6.3.0
 * @access private
 */
function _wp_post_thumbnail_context_filter_remove() {
	remove_filter( &#039;wp_get_attachment_image_context&#039;, &#039;_wp_post_thumbnail_context_filter&#039; );
}

add_shortcode( &#039;wp_caption&#039;, &#039;img_caption_shortcode&#039; );
add_shortcode( &#039;caption&#039;, &#039;img_caption_shortcode&#039; );

/**
 * Builds the Caption shortcode output.
 *
 * Allows a plugin to replace the content that would otherwise be returned. The
 * filter is {@see &#039;img_caption_shortcode&#039;} and passes an empty string, the attr
 * parameter and the content parameter values.
 *
 * The supported attributes for the shortcode are &#039;id&#039;, &#039;caption_id&#039;, &#039;align&#039;,
 * &#039;width&#039;, &#039;caption&#039;, and &#039;class&#039;.
 *
 * @since 2.6.0
 * @since 3.9.0 The `class` attribute was added.
 * @since 5.1.0 The `caption_id` attribute was added.
 * @since 5.9.0 The `$content` parameter default value changed from `null` to `&#039;&#039;`.
 *
 * @param array  $attr {
 *     Attributes of the caption shortcode.
 *
 *     @type string $id         ID of the image and caption container element, i.e. `&lt;figure&gt;` or `&lt;div&gt;`.
 *     @type string $caption_id ID of the caption element, i.e. `&lt;figcaption&gt;` or `&lt;p&gt;`.
 *     @type string $align      Class name that aligns the caption. Default &#039;alignnone&#039;. Accepts &#039;alignleft&#039;,
 *                              &#039;aligncenter&#039;, alignright&#039;, &#039;alignnone&#039;.
 *     @type int    $width      The width of the caption, in pixels.
 *     @type string $caption    The caption text.
 *     @type string $class      Additional class name(s) added to the caption container.
 * }
 * @param string $content Optional. Shortcode content. Default empty string.
 * @return string HTML content to display the caption.
 */
function img_caption_shortcode( $attr, $content = &#039;&#039; ) {
	// New-style shortcode with the caption inside the shortcode with the link and image tags.
	if ( ! isset( $attr[&#039;caption&#039;] ) ) {
		if ( preg_match( &#039;#((?:&lt;a [^&gt;]+&gt;\s*)?&lt;img [^&gt;]+&gt;(?:\s*&lt;/a&gt;)?)(.*)#is&#039;, $content, $matches ) ) {
			$content         = $matches[1];
			$attr[&#039;caption&#039;] = trim( $matches[2] );
		}
	} elseif ( str_contains( $attr[&#039;caption&#039;], &#039;&lt;&#039; ) ) {
		$attr[&#039;caption&#039;] = wp_kses( $attr[&#039;caption&#039;], &#039;post&#039; );
	}

	/**
	 * Filters the default caption shortcode output.
	 *
	 * If the filtered output isn&#039;t empty, it will be used instead of generating
	 * the default caption template.
	 *
	 * @since 2.6.0
	 *
	 * @see img_caption_shortcode()
	 *
	 * @param string $output  The caption output. Default empty.
	 * @param array  $attr    Attributes of the caption shortcode.
	 * @param string $content The image element, possibly wrapped in a hyperlink.
	 */
	$output = apply_filters( &#039;img_caption_shortcode&#039;, &#039;&#039;, $attr, $content );

	if ( ! empty( $output ) ) {
		return $output;
	}

	$atts = shortcode_atts(
		array(
			&#039;id&#039;         =&gt; &#039;&#039;,
			&#039;caption_id&#039; =&gt; &#039;&#039;,
			&#039;align&#039;      =&gt; &#039;alignnone&#039;,
			&#039;width&#039;      =&gt; &#039;&#039;,
			&#039;caption&#039;    =&gt; &#039;&#039;,
			&#039;class&#039;      =&gt; &#039;&#039;,
		),
		$attr,
		&#039;caption&#039;
	);

	$atts[&#039;width&#039;] = (int) $atts[&#039;width&#039;];

	if ( $atts[&#039;width&#039;] &lt; 1 || empty( $atts[&#039;caption&#039;] ) ) {
		return $content;
	}

	$id          = &#039;&#039;;
	$caption_id  = &#039;&#039;;
	$describedby = &#039;&#039;;

	if ( $atts[&#039;id&#039;] ) {
		$atts[&#039;id&#039;] = sanitize_html_class( $atts[&#039;id&#039;] );
		$id         = &#039;id=&quot;&#039; . esc_attr( $atts[&#039;id&#039;] ) . &#039;&quot; &#039;;
	}

	if ( $atts[&#039;caption_id&#039;] ) {
		$atts[&#039;caption_id&#039;] = sanitize_html_class( $atts[&#039;caption_id&#039;] );
	} elseif ( $atts[&#039;id&#039;] ) {
		$atts[&#039;caption_id&#039;] = &#039;caption-&#039; . str_replace( &#039;_&#039;, &#039;-&#039;, $atts[&#039;id&#039;] );
	}

	if ( $atts[&#039;caption_id&#039;] ) {
		$caption_id  = &#039;id=&quot;&#039; . esc_attr( $atts[&#039;caption_id&#039;] ) . &#039;&quot; &#039;;
		$describedby = &#039;aria-describedby=&quot;&#039; . esc_attr( $atts[&#039;caption_id&#039;] ) . &#039;&quot; &#039;;
	}

	$class = trim( &#039;wp-caption &#039; . $atts[&#039;align&#039;] . &#039; &#039; . $atts[&#039;class&#039;] );

	$html5 = current_theme_supports( &#039;html5&#039;, &#039;caption&#039; );
	// HTML5 captions never added the extra 10px to the image width.
	$width = $html5 ? $atts[&#039;width&#039;] : ( 10 + $atts[&#039;width&#039;] );

	/**
	 * Filters the width of an image&#039;s caption.
	 *
	 * By default, the caption is 10 pixels greater than the width of the image,
	 * to prevent post content from running up against a floated image.
	 *
	 * @since 3.7.0
	 *
	 * @see img_caption_shortcode()
	 *
	 * @param int    $width    Width of the caption in pixels. To remove this inline style,
	 *                         return zero.
	 * @param array  $atts     Attributes of the caption shortcode.
	 * @param string $content  The image element, possibly wrapped in a hyperlink.
	 */
	$caption_width = apply_filters( &#039;img_caption_shortcode_width&#039;, $width, $atts, $content );

	$style = &#039;&#039;;

	if ( $caption_width ) {
		$style = &#039;style=&quot;width: &#039; . (int) $caption_width . &#039;px&quot; &#039;;
	}

	if ( $html5 ) {
		$html = sprintf(
			&#039;&lt;figure %s%s%sclass=&quot;%s&quot;&gt;%s%s&lt;/figure&gt;&#039;,
			$id,
			$describedby,
			$style,
			esc_attr( $class ),
			do_shortcode( $content ),
			sprintf(
				&#039;&lt;figcaption %sclass=&quot;wp-caption-text&quot;&gt;%s&lt;/figcaption&gt;&#039;,
				$caption_id,
				$atts[&#039;caption&#039;]
			)
		);
	} else {
		$html = sprintf(
			&#039;&lt;div %s%sclass=&quot;%s&quot;&gt;%s%s&lt;/div&gt;&#039;,
			$id,
			$style,
			esc_attr( $class ),
			str_replace( &#039;&lt;img &#039;, &#039;&lt;img &#039; . $describedby, do_shortcode( $content ) ),
			sprintf(
				&#039;&lt;p %sclass=&quot;wp-caption-text&quot;&gt;%s&lt;/p&gt;&#039;,
				$caption_id,
				$atts[&#039;caption&#039;]
			)
		);
	}

	return $html;
}

add_shortcode( &#039;gallery&#039;, &#039;gallery_shortcode&#039; );

/**
 * Builds the Gallery shortcode output.
 *
 * This implements the functionality of the Gallery Shortcode for displaying
 * WordPress images on a post.
 *
 * @since 2.5.0
 * @since 2.8.0 Added the `$attr` parameter to set the shortcode output. New attributes included
 *              such as `size`, `itemtag`, `icontag`, `captiontag`, and columns. Changed markup from
 *              `div` tags to `dl`, `dt` and `dd` tags. Support more than one gallery on the
 *              same page.
 * @since 2.9.0 Added support for `include` and `exclude` to shortcode.
 * @since 3.5.0 Use get_post() instead of global `$post`. Handle mapping of `ids` to `include`
 *              and `orderby`.
 * @since 3.6.0 Added validation for tags used in gallery shortcode. Add orientation information to items.
 * @since 3.7.0 Introduced the `link` attribute.
 * @since 3.9.0 `html5` gallery support, accepting &#039;itemtag&#039;, &#039;icontag&#039;, and &#039;captiontag&#039; attributes.
 * @since 4.0.0 Removed use of `extract()`.
 * @since 4.1.0 Added attribute to `wp_get_attachment_link()` to output `aria-describedby`.
 * @since 4.2.0 Passed the shortcode instance ID to `post_gallery` and `post_playlist` filters.
 * @since 4.6.0 Standardized filter docs to match documentation standards for PHP.
 * @since 5.1.0 Code cleanup for WPCS 1.0.0 coding standards.
 * @since 5.3.0 Saved progress of intermediate image creation after upload.
 * @since 5.5.0 Ensured that galleries can be output as a list of links in feeds.
 * @since 5.6.0 Replaced order-style PHP type conversion functions with typecasts. Fix logic for
 *              an array of image dimensions.
 *
 * @param array $attr {
 *     Attributes of the gallery shortcode.
 *
 *     @type string       $order      Order of the images in the gallery. Default &#039;ASC&#039;. Accepts &#039;ASC&#039;, &#039;DESC&#039;.
 *     @type string       $orderby    The field to use when ordering the images. Default &#039;menu_order ID&#039;.
 *                                    Accepts any valid SQL ORDERBY statement.
 *     @type int          $id         Post ID.
 *     @type string       $itemtag    HTML tag to use for each image in the gallery.
 *                                    Default &#039;dl&#039;, or &#039;figure&#039; when the theme registers HTML5 gallery support.
 *     @type string       $icontag    HTML tag to use for each image&#039;s icon.
 *                                    Default &#039;dt&#039;, or &#039;div&#039; when the theme registers HTML5 gallery support.
 *     @type string       $captiontag HTML tag to use for each image&#039;s caption.
 *                                    Default &#039;dd&#039;, or &#039;figcaption&#039; when the theme registers HTML5 gallery support.
 *     @type int          $columns    Number of columns of images to display. Default 3.
 *     @type string|int[] $size       Size of the images to display. Accepts any registered image size name, or an array
 *                                    of width and height values in pixels (in that order). Default &#039;thumbnail&#039;.
 *     @type string       $ids        A comma-separated list of IDs of attachments to display. Default empty.
 *     @type string       $include    A comma-separated list of IDs of attachments to include. Default empty.
 *     @type string       $exclude    A comma-separated list of IDs of attachments to exclude. Default empty.
 *     @type string       $link       What to link each image to. Default empty (links to the attachment page).
 *                                    Accepts &#039;file&#039;, &#039;none&#039;.
 * }
 * @return string HTML content to display gallery.
 */
function gallery_shortcode( $attr ) {
	$post = get_post();

	static $instance = 0;
	$instance++;

	if ( ! empty( $attr[&#039;ids&#039;] ) ) {
		// &#039;ids&#039; is explicitly ordered, unless you specify otherwise.
		if ( empty( $attr[&#039;orderby&#039;] ) ) {
			$attr[&#039;orderby&#039;] = &#039;post__in&#039;;
		}
		$attr[&#039;include&#039;] = $attr[&#039;ids&#039;];
	}

	/**
	 * Filters the default gallery shortcode output.
	 *
	 * If the filtered output isn&#039;t empty, it will be used instead of generating
	 * the default gallery template.
	 *
	 * @since 2.5.0
	 * @since 4.2.0 The `$instance` parameter was added.
	 *
	 * @see gallery_shortcode()
	 *
	 * @param string $output   The gallery output. Default empty.
	 * @param array  $attr     Attributes of the gallery shortcode.
	 * @param int    $instance Unique numeric ID of this gallery shortcode instance.
	 */
	$output = apply_filters( &#039;post_gallery&#039;, &#039;&#039;, $attr, $instance );

	if ( ! empty( $output ) ) {
		return $output;
	}

	$html5 = current_theme_supports( &#039;html5&#039;, &#039;gallery&#039; );
	$atts  = shortcode_atts(
		array(
			&#039;order&#039;      =&gt; &#039;ASC&#039;,
			&#039;orderby&#039;    =&gt; &#039;menu_order ID&#039;,
			&#039;id&#039;         =&gt; $post ? $post-&gt;ID : 0,
			&#039;itemtag&#039;    =&gt; $html5 ? &#039;figure&#039; : &#039;dl&#039;,
			&#039;icontag&#039;    =&gt; $html5 ? &#039;div&#039; : &#039;dt&#039;,
			&#039;captiontag&#039; =&gt; $html5 ? &#039;figcaption&#039; : &#039;dd&#039;,
			&#039;columns&#039;    =&gt; 3,
			&#039;size&#039;       =&gt; &#039;thumbnail&#039;,
			&#039;include&#039;    =&gt; &#039;&#039;,
			&#039;exclude&#039;    =&gt; &#039;&#039;,
			&#039;link&#039;       =&gt; &#039;&#039;,
		),
		$attr,
		&#039;gallery&#039;
	);

	$id = (int) $atts[&#039;id&#039;];

	if ( ! empty( $atts[&#039;include&#039;] ) ) {
		$_attachments = get_posts(
			array(
				&#039;include&#039;        =&gt; $atts[&#039;include&#039;],
				&#039;post_status&#039;    =&gt; &#039;inherit&#039;,
				&#039;post_type&#039;      =&gt; &#039;attachment&#039;,
				&#039;post_mime_type&#039; =&gt; &#039;image&#039;,
				&#039;order&#039;          =&gt; $atts[&#039;order&#039;],
				&#039;orderby&#039;        =&gt; $atts[&#039;orderby&#039;],
			)
		);

		$attachments = array();
		foreach ( $_attachments as $key =&gt; $val ) {
			$attachments[ $val-&gt;ID ] = $_attachments[ $key ];
		}
	} elseif ( ! empty( $atts[&#039;exclude&#039;] ) ) {
		$attachments = get_children(
			array(
				&#039;post_parent&#039;    =&gt; $id,
				&#039;exclude&#039;        =&gt; $atts[&#039;exclude&#039;],
				&#039;post_status&#039;    =&gt; &#039;inherit&#039;,
				&#039;post_type&#039;      =&gt; &#039;attachment&#039;,
				&#039;post_mime_type&#039; =&gt; &#039;image&#039;,
				&#039;order&#039;          =&gt; $atts[&#039;order&#039;],
				&#039;orderby&#039;        =&gt; $atts[&#039;orderby&#039;],
			)
		);
	} else {
		$attachments = get_children(
			array(
				&#039;post_parent&#039;    =&gt; $id,
				&#039;post_status&#039;    =&gt; &#039;inherit&#039;,
				&#039;post_type&#039;      =&gt; &#039;attachment&#039;,
				&#039;post_mime_type&#039; =&gt; &#039;image&#039;,
				&#039;order&#039;          =&gt; $atts[&#039;order&#039;],
				&#039;orderby&#039;        =&gt; $atts[&#039;orderby&#039;],
			)
		);
	}

	if ( empty( $attachments ) ) {
		return &#039;&#039;;
	}

	if ( is_feed() ) {
		$output = &quot;\n&quot;;
		foreach ( $attachments as $att_id =&gt; $attachment ) {
			if ( ! empty( $atts[&#039;link&#039;] ) ) {
				if ( &#039;none&#039; === $atts[&#039;link&#039;] ) {
					$output .= wp_get_attachment_image( $att_id, $atts[&#039;size&#039;], false, $attr );
				} else {
					$output .= wp_get_attachment_link( $att_id, $atts[&#039;size&#039;], false );
				}
			} else {
				$output .= wp_get_attachment_link( $att_id, $atts[&#039;size&#039;], true );
			}
			$output .= &quot;\n&quot;;
		}
		return $output;
	}

	$itemtag    = tag_escape( $atts[&#039;itemtag&#039;] );
	$captiontag = tag_escape( $atts[&#039;captiontag&#039;] );
	$icontag    = tag_escape( $atts[&#039;icontag&#039;] );
	$valid_tags = wp_kses_allowed_html( &#039;post&#039; );
	if ( ! isset( $valid_tags[ $itemtag ] ) ) {
		$itemtag = &#039;dl&#039;;
	}
	if ( ! isset( $valid_tags[ $captiontag ] ) ) {
		$captiontag = &#039;dd&#039;;
	}
	if ( ! isset( $valid_tags[ $icontag ] ) ) {
		$icontag = &#039;dt&#039;;
	}

	$columns   = (int) $atts[&#039;columns&#039;];
	$itemwidth = $columns &gt; 0 ? floor( 100 / $columns ) : 100;
	$float     = is_rtl() ? &#039;right&#039; : &#039;left&#039;;

	$selector = &quot;gallery-{$instance}&quot;;

	$gallery_style = &#039;&#039;;

	/**
	 * Filters whether to print default gallery styles.
	 *
	 * @since 3.1.0
	 *
	 * @param bool $print Whether to print default gallery styles.
	 *                    Defaults to false if the theme supports HTML5 galleries.
	 *                    Otherwise, defaults to true.
	 */
	if ( apply_filters( &#039;use_default_gallery_style&#039;, ! $html5 ) ) {
		$type_attr = current_theme_supports( &#039;html5&#039;, &#039;style&#039; ) ? &#039;&#039; : &#039; type=&quot;text/css&quot;&#039;;

		$gallery_style = &quot;
		&lt;style{$type_attr}&gt;
			#{$selector} {
				margin: auto;
			}
			#{$selector} .gallery-item {
				float: {$float};
				margin-top: 10px;
				text-align: center;
				width: {$itemwidth}%;
			}
			#{$selector} img {
				border: 2px solid #cfcfcf;
			}
			#{$selector} .gallery-caption {
				margin-left: 0;
			}
			/* see gallery_shortcode() in wp-includes/media.php */
		&lt;/style&gt;\n\t\t&quot;;
	}

	$size_class  = sanitize_html_class( is_array( $atts[&#039;size&#039;] ) ? implode( &#039;x&#039;, $atts[&#039;size&#039;] ) : $atts[&#039;size&#039;] );
	$gallery_div = &quot;&lt;div id=&#039;$selector&#039; class=&#039;gallery galleryid-{$id} gallery-columns-{$columns} gallery-size-{$size_class}&#039;&gt;&quot;;

	/**
	 * Filters the default gallery shortcode CSS styles.
	 *
	 * @since 2.5.0
	 *
	 * @param string $gallery_style Default CSS styles and opening HTML div container
	 *                              for the gallery shortcode output.
	 */
	$output = apply_filters( &#039;gallery_style&#039;, $gallery_style . $gallery_div );

	$i = 0;

	foreach ( $attachments as $id =&gt; $attachment ) {

		$attr = ( trim( $attachment-&gt;post_excerpt ) ) ? array( &#039;aria-describedby&#039; =&gt; &quot;$selector-$id&quot; ) : &#039;&#039;;

		if ( ! empty( $atts[&#039;link&#039;] ) &amp;&amp; &#039;file&#039; === $atts[&#039;link&#039;] ) {
			$image_output = wp_get_attachment_link( $id, $atts[&#039;size&#039;], false, false, false, $attr );
		} elseif ( ! empty( $atts[&#039;link&#039;] ) &amp;&amp; &#039;none&#039; === $atts[&#039;link&#039;] ) {
			$image_output = wp_get_attachment_image( $id, $atts[&#039;size&#039;], false, $attr );
		} else {
			$image_output = wp_get_attachment_link( $id, $atts[&#039;size&#039;], true, false, false, $attr );
		}

		$image_meta = wp_get_attachment_metadata( $id );

		$orientation = &#039;&#039;;

		if ( isset( $image_meta[&#039;height&#039;], $image_meta[&#039;width&#039;] ) ) {
			$orientation = ( $image_meta[&#039;height&#039;] &gt; $image_meta[&#039;width&#039;] ) ? &#039;portrait&#039; : &#039;landscape&#039;;
		}

		$output .= &quot;&lt;{$itemtag} class=&#039;gallery-item&#039;&gt;&quot;;
		$output .= &quot;
			&lt;{$icontag} class=&#039;gallery-icon {$orientation}&#039;&gt;
				$image_output
			&lt;/{$icontag}&gt;&quot;;

		if ( $captiontag &amp;&amp; trim( $attachment-&gt;post_excerpt ) ) {
			$output .= &quot;
				&lt;{$captiontag} class=&#039;wp-caption-text gallery-caption&#039; id=&#039;$selector-$id&#039;&gt;
				&quot; . wptexturize( $attachment-&gt;post_excerpt ) . &quot;
				&lt;/{$captiontag}&gt;&quot;;
		}

		$output .= &quot;&lt;/{$itemtag}&gt;&quot;;

		if ( ! $html5 &amp;&amp; $columns &gt; 0 &amp;&amp; 0 === ++$i % $columns ) {
			$output .= &#039;&lt;br style=&quot;clear: both&quot; /&gt;&#039;;
		}
	}

	if ( ! $html5 &amp;&amp; $columns &gt; 0 &amp;&amp; 0 !== $i % $columns ) {
		$output .= &quot;
			&lt;br style=&#039;clear: both&#039; /&gt;&quot;;
	}

	$output .= &quot;
		&lt;/div&gt;\n&quot;;

	return $output;
}

/**
 * Outputs the templates used by playlists.
 *
 * @since 3.9.0
 */
function wp_underscore_playlist_templates() {
	?&gt;
&lt;script type=&quot;text/html&quot; id=&quot;tmpl-wp-playlist-current-item&quot;&gt;
	&lt;# if ( data.thumb &amp;&amp; data.thumb.src ) { #&gt;
		&lt;img src=&quot;{{ data.thumb.src }}&quot; alt=&quot;&quot; /&gt;
	&lt;# } #&gt;
	&lt;div class=&quot;wp-playlist-caption&quot;&gt;
		&lt;span class=&quot;wp-playlist-item-meta wp-playlist-item-title&quot;&gt;
			&lt;# if ( data.meta.album || data.meta.artist ) { #&gt;
				&lt;?php
				/* translators: %s: Playlist item title. */
				printf( _x( &#039;&amp;#8220;%s&amp;#8221;&#039;, &#039;playlist item title&#039; ), &#039;{{ data.title }}&#039; );
				?&gt;
			&lt;# } else { #&gt;
				{{ data.title }}
			&lt;# } #&gt;
		&lt;/span&gt;
		&lt;# if ( data.meta.album ) { #&gt;&lt;span class=&quot;wp-playlist-item-meta wp-playlist-item-album&quot;&gt;{{ data.meta.album }}&lt;/span&gt;&lt;# } #&gt;
		&lt;# if ( data.meta.artist ) { #&gt;&lt;span class=&quot;wp-playlist-item-meta wp-playlist-item-artist&quot;&gt;{{ data.meta.artist }}&lt;/span&gt;&lt;# } #&gt;
	&lt;/div&gt;
&lt;/script&gt;
&lt;script type=&quot;text/html&quot; id=&quot;tmpl-wp-playlist-item&quot;&gt;
	&lt;div class=&quot;wp-playlist-item&quot;&gt;
		&lt;a class=&quot;wp-playlist-caption&quot; href=&quot;{{ data.src }}&quot;&gt;
			{{ data.index ? ( data.index + &#039;. &#039; ) : &#039;&#039; }}
			&lt;# if ( data.caption ) { #&gt;
				{{ data.caption }}
			&lt;# } else { #&gt;
				&lt;# if ( data.artists &amp;&amp; data.meta.artist ) { #&gt;
					&lt;span class=&quot;wp-playlist-item-title&quot;&gt;
						&lt;?php
						/* translators: %s: Playlist item title. */
						printf( _x( &#039;&amp;#8220;%s&amp;#8221;&#039;, &#039;playlist item title&#039; ), &#039;{{{ data.title }}}&#039; );
						?&gt;
					&lt;/span&gt;
					&lt;span class=&quot;wp-playlist-item-artist&quot;&gt; &amp;mdash; {{ data.meta.artist }}&lt;/span&gt;
				&lt;# } else { #&gt;
					&lt;span class=&quot;wp-playlist-item-title&quot;&gt;{{{ data.title }}}&lt;/span&gt;
				&lt;# } #&gt;
			&lt;# } #&gt;
		&lt;/a&gt;
		&lt;# if ( data.meta.length_formatted ) { #&gt;
		&lt;div class=&quot;wp-playlist-item-length&quot;&gt;{{ data.meta.length_formatted }}&lt;/div&gt;
		&lt;# } #&gt;
	&lt;/div&gt;
&lt;/script&gt;
	&lt;?php
}

/**
 * Outputs and enqueues default scripts and styles for playlists.
 *
 * @since 3.9.0
 *
 * @param string $type Type of playlist. Accepts &#039;audio&#039; or &#039;video&#039;.
 */
function wp_playlist_scripts( $type ) {
	wp_enqueue_style( &#039;wp-mediaelement&#039; );
	wp_enqueue_script( &#039;wp-playlist&#039; );
	?&gt;
&lt;!--[if lt IE 9]&gt;&lt;script&gt;document.createElement(&#039;&lt;?php echo esc_js( $type ); ?&gt;&#039;);&lt;/script&gt;&lt;![endif]--&gt;
	&lt;?php
	add_action( &#039;wp_footer&#039;, &#039;wp_underscore_playlist_templates&#039;, 0 );
	add_action( &#039;admin_footer&#039;, &#039;wp_underscore_playlist_templates&#039;, 0 );
}

/**
 * Builds the Playlist shortcode output.
 *
 * This implements the functionality of the playlist shortcode for displaying
 * a collection of WordPress audio or video files in a post.
 *
 * @since 3.9.0
 *
 * @global int $content_width
 *
 * @param array $attr {
 *     Array of default playlist attributes.
 *
 *     @type string  $type         Type of playlist to display. Accepts &#039;audio&#039; or &#039;video&#039;. Default &#039;audio&#039;.
 *     @type string  $order        Designates ascending or descending order of items in the playlist.
 *                                 Accepts &#039;ASC&#039;, &#039;DESC&#039;. Default &#039;ASC&#039;.
 *     @type string  $orderby      Any column, or columns, to sort the playlist. If $ids are
 *                                 passed, this defaults to the order of the $ids array (&#039;post__in&#039;).
 *                                 Otherwise default is &#039;menu_order ID&#039;.
 *     @type int     $id           If an explicit $ids array is not present, this parameter
 *                                 will determine which attachments are used for the playlist.
 *                                 Default is the current post ID.
 *     @type array   $ids          Create a playlist out of these explicit attachment IDs. If empty,
 *                                 a playlist will be created from all $type attachments of $id.
 *                                 Default empty.
 *     @type array   $exclude      List of specific attachment IDs to exclude from the playlist. Default empty.
 *     @type string  $style        Playlist style to use. Accepts &#039;light&#039; or &#039;dark&#039;. Default &#039;light&#039;.
 *     @type bool    $tracklist    Whether to show or hide the playlist. Default true.
 *     @type bool    $tracknumbers Whether to show or hide the numbers next to entries in the playlist. Default true.
 *     @type bool    $images       Show or hide the video or audio thumbnail (Featured Image/post
 *                                 thumbnail). Default true.
 *     @type bool    $artists      Whether to show or hide artist name in the playlist. Default true.
 * }
 *
 * @return string Playlist output. Empty string if the passed type is unsupported.
 */
function wp_playlist_shortcode( $attr ) {
	global $content_width;
	$post = get_post();

	static $instance = 0;
	$instance++;

	if ( ! empty( $attr[&#039;ids&#039;] ) ) {
		// &#039;ids&#039; is explicitly ordered, unless you specify otherwise.
		if ( empty( $attr[&#039;orderby&#039;] ) ) {
			$attr[&#039;orderby&#039;] = &#039;post__in&#039;;
		}
		$attr[&#039;include&#039;] = $attr[&#039;ids&#039;];
	}

	/**
	 * Filters the playlist output.
	 *
	 * Returning a non-empty value from the filter will short-circuit generation
	 * of the default playlist output, returning the passed value instead.
	 *
	 * @since 3.9.0
	 * @since 4.2.0 The `$instance` parameter was added.
	 *
	 * @param string $output   Playlist output. Default empty.
	 * @param array  $attr     An array of shortcode attributes.
	 * @param int    $instance Unique numeric ID of this playlist shortcode instance.
	 */
	$output = apply_filters( &#039;post_playlist&#039;, &#039;&#039;, $attr, $instance );

	if ( ! empty( $output ) ) {
		return $output;
	}

	$atts = shortcode_atts(
		array(
			&#039;type&#039;         =&gt; &#039;audio&#039;,
			&#039;order&#039;        =&gt; &#039;ASC&#039;,
			&#039;orderby&#039;      =&gt; &#039;menu_order ID&#039;,
			&#039;id&#039;           =&gt; $post ? $post-&gt;ID : 0,
			&#039;include&#039;      =&gt; &#039;&#039;,
			&#039;exclude&#039;      =&gt; &#039;&#039;,
			&#039;style&#039;        =&gt; &#039;light&#039;,
			&#039;tracklist&#039;    =&gt; true,
			&#039;tracknumbers&#039; =&gt; true,
			&#039;images&#039;       =&gt; true,
			&#039;artists&#039;      =&gt; true,
		),
		$attr,
		&#039;playlist&#039;
	);

	$id = (int) $atts[&#039;id&#039;];

	if ( &#039;audio&#039; !== $atts[&#039;type&#039;] ) {
		$atts[&#039;type&#039;] = &#039;video&#039;;
	}

	$args = array(
		&#039;post_status&#039;    =&gt; &#039;inherit&#039;,
		&#039;post_type&#039;      =&gt; &#039;attachment&#039;,
		&#039;post_mime_type&#039; =&gt; $atts[&#039;type&#039;],
		&#039;order&#039;          =&gt; $atts[&#039;order&#039;],
		&#039;orderby&#039;        =&gt; $atts[&#039;orderby&#039;],
	);

	if ( ! empty( $atts[&#039;include&#039;] ) ) {
		$args[&#039;include&#039;] = $atts[&#039;include&#039;];
		$_attachments    = get_posts( $args );

		$attachments = array();
		foreach ( $_attachments as $key =&gt; $val ) {
			$attachments[ $val-&gt;ID ] = $_attachments[ $key ];
		}
	} elseif ( ! empty( $atts[&#039;exclude&#039;] ) ) {
		$args[&#039;post_parent&#039;] = $id;
		$args[&#039;exclude&#039;]     = $atts[&#039;exclude&#039;];
		$attachments         = get_children( $args );
	} else {
		$args[&#039;post_parent&#039;] = $id;
		$attachments         = get_children( $args );
	}

	if ( empty( $attachments ) ) {
		return &#039;&#039;;
	}

	if ( is_feed() ) {
		$output = &quot;\n&quot;;
		foreach ( $attachments as $att_id =&gt; $attachment ) {
			$output .= wp_get_attachment_link( $att_id ) . &quot;\n&quot;;
		}
		return $output;
	}

	$outer = 22; // Default padding and border of wrapper.

	$default_width  = 640;
	$default_height = 360;

	$theme_width  = empty( $content_width ) ? $default_width : ( $content_width - $outer );
	$theme_height = empty( $content_width ) ? $default_height : round( ( $default_height * $theme_width ) / $default_width );

	$data = array(
		&#039;type&#039;         =&gt; $atts[&#039;type&#039;],
		// Don&#039;t pass strings to JSON, will be truthy in JS.
		&#039;tracklist&#039;    =&gt; wp_validate_boolean( $atts[&#039;tracklist&#039;] ),
		&#039;tracknumbers&#039; =&gt; wp_validate_boolean( $atts[&#039;tracknumbers&#039;] ),
		&#039;images&#039;       =&gt; wp_validate_boolean( $atts[&#039;images&#039;] ),
		&#039;artists&#039;      =&gt; wp_validate_boolean( $atts[&#039;artists&#039;] ),
	);

	$tracks = array();
	foreach ( $attachments as $attachment ) {
		$url   = wp_get_attachment_url( $attachment-&gt;ID );
		$ftype = wp_check_filetype( $url, wp_get_mime_types() );
		$track = array(
			&#039;src&#039;         =&gt; $url,
			&#039;type&#039;        =&gt; $ftype[&#039;type&#039;],
			&#039;title&#039;       =&gt; $attachment-&gt;post_title,
			&#039;caption&#039;     =&gt; $attachment-&gt;post_excerpt,
			&#039;description&#039; =&gt; $attachment-&gt;post_content,
		);

		$track[&#039;meta&#039;] = array();
		$meta          = wp_get_attachment_metadata( $attachment-&gt;ID );
		if ( ! empty( $meta ) ) {

			foreach ( wp_get_attachment_id3_keys( $attachment ) as $key =&gt; $label ) {
				if ( ! empty( $meta[ $key ] ) ) {
					$track[&#039;meta&#039;][ $key ] = $meta[ $key ];
				}
			}

			if ( &#039;video&#039; === $atts[&#039;type&#039;] ) {
				if ( ! empty( $meta[&#039;width&#039;] ) &amp;&amp; ! empty( $meta[&#039;height&#039;] ) ) {
					$width        = $meta[&#039;width&#039;];
					$height       = $meta[&#039;height&#039;];
					$theme_height = round( ( $height * $theme_width ) / $width );
				} else {
					$width  = $default_width;
					$height = $default_height;
				}

				$track[&#039;dimensions&#039;] = array(
					&#039;original&#039; =&gt; compact( &#039;width&#039;, &#039;height&#039; ),
					&#039;resized&#039;  =&gt; array(
						&#039;width&#039;  =&gt; $theme_width,
						&#039;height&#039; =&gt; $theme_height,
					),
				);
			}
		}

		if ( $atts[&#039;images&#039;] ) {
			$thumb_id = get_post_thumbnail_id( $attachment-&gt;ID );
			if ( ! empty( $thumb_id ) ) {
				list( $src, $width, $height ) = wp_get_attachment_image_src( $thumb_id, &#039;full&#039; );
				$track[&#039;image&#039;]               = compact( &#039;src&#039;, &#039;width&#039;, &#039;height&#039; );
				list( $src, $width, $height ) = wp_get_attachment_image_src( $thumb_id, &#039;thumbnail&#039; );
				$track[&#039;thumb&#039;]               = compact( &#039;src&#039;, &#039;width&#039;, &#039;height&#039; );
			} else {
				$src            = wp_mime_type_icon( $attachment-&gt;ID );
				$width          = 48;
				$height         = 64;
				$track[&#039;image&#039;] = compact( &#039;src&#039;, &#039;width&#039;, &#039;height&#039; );
				$track[&#039;thumb&#039;] = compact( &#039;src&#039;, &#039;width&#039;, &#039;height&#039; );
			}
		}

		$tracks[] = $track;
	}
	$data[&#039;tracks&#039;] = $tracks;

	$safe_type  = esc_attr( $atts[&#039;type&#039;] );
	$safe_style = esc_attr( $atts[&#039;style&#039;] );

	ob_start();

	if ( 1 === $instance ) {
		/**
		 * Prints and enqueues playlist scripts, styles, and JavaScript templates.
		 *
		 * @since 3.9.0
		 *
		 * @param string $type  Type of playlist. Possible values are &#039;audio&#039; or &#039;video&#039;.
		 * @param string $style The &#039;theme&#039; for the playlist. Core provides &#039;light&#039; and &#039;dark&#039;.
		 */
		do_action( &#039;wp_playlist_scripts&#039;, $atts[&#039;type&#039;], $atts[&#039;style&#039;] );
	}
	?&gt;
&lt;div class=&quot;wp-playlist wp-&lt;?php echo $safe_type; ?&gt;-playlist wp-playlist-&lt;?php echo $safe_style; ?&gt;&quot;&gt;
	&lt;?php if ( &#039;audio&#039; === $atts[&#039;type&#039;] ) : ?&gt;
		&lt;div class=&quot;wp-playlist-current-item&quot;&gt;&lt;/div&gt;
	&lt;?php endif; ?&gt;
	&lt;&lt;?php echo $safe_type; ?&gt; controls=&quot;controls&quot; preload=&quot;none&quot; width=&quot;&lt;?php echo (int) $theme_width; ?&gt;&quot;
		&lt;?php
		if ( &#039;video&#039; === $safe_type ) {
			echo &#039; height=&quot;&#039;, (int) $theme_height, &#039;&quot;&#039;;
		}
		?&gt;
	&gt;&lt;/&lt;?php echo $safe_type; ?&gt;&gt;
	&lt;div class=&quot;wp-playlist-next&quot;&gt;&lt;/div&gt;
	&lt;div class=&quot;wp-playlist-prev&quot;&gt;&lt;/div&gt;
	&lt;noscript&gt;
	&lt;ol&gt;
		&lt;?php
		foreach ( $attachments as $att_id =&gt; $attachment ) {
			printf( &#039;&lt;li&gt;%s&lt;/li&gt;&#039;, wp_get_attachment_link( $att_id ) );
		}
		?&gt;
	&lt;/ol&gt;
	&lt;/noscript&gt;
	&lt;script type=&quot;application/json&quot; class=&quot;wp-playlist-script&quot;&gt;&lt;?php echo wp_json_encode( $data ); ?&gt;&lt;/script&gt;
&lt;/div&gt;
	&lt;?php
	return ob_get_clean();
}
add_shortcode( &#039;playlist&#039;, &#039;wp_playlist_shortcode&#039; );

/**
 * Provides a No-JS Flash fallback as a last resort for audio / video.
 *
 * @since 3.6.0
 *
 * @param string $url The media element URL.
 * @return string Fallback HTML.
 */
function wp_mediaelement_fallback( $url ) {
	/**
	 * Filters the Mediaelement fallback output for no-JS.
	 *
	 * @since 3.6.0
	 *
	 * @param string $output Fallback output for no-JS.
	 * @param string $url    Media file URL.
	 */
	return apply_filters( &#039;wp_mediaelement_fallback&#039;, sprintf( &#039;&lt;a href=&quot;%1$s&quot;&gt;%1$s&lt;/a&gt;&#039;, esc_url( $url ) ), $url );
}

/**
 * Returns a filtered list of supported audio formats.
 *
 * @since 3.6.0
 *
 * @return string[] Supported audio formats.
 */
function wp_get_audio_extensions() {
	/**
	 * Filters the list of supported audio formats.
	 *
	 * @since 3.6.0
	 *
	 * @param string[] $extensions An array of supported audio formats. Defaults are
	 *                            &#039;mp3&#039;, &#039;ogg&#039;, &#039;flac&#039;, &#039;m4a&#039;, &#039;wav&#039;.
	 */
	return apply_filters( &#039;wp_audio_extensions&#039;, array( &#039;mp3&#039;, &#039;ogg&#039;, &#039;flac&#039;, &#039;m4a&#039;, &#039;wav&#039; ) );
}

/**
 * Returns useful keys to use to lookup data from an attachment&#039;s stored metadata.
 *
 * @since 3.9.0
 *
 * @param WP_Post $attachment The current attachment, provided for context.
 * @param string  $context    Optional. The context. Accepts &#039;edit&#039;, &#039;display&#039;. Default &#039;display&#039;.
 * @return string[] Key/value pairs of field keys to labels.
 */
function wp_get_attachment_id3_keys( $attachment, $context = &#039;display&#039; ) {
	$fields = array(
		&#039;artist&#039; =&gt; __( &#039;Artist&#039; ),
		&#039;album&#039;  =&gt; __( &#039;Album&#039; ),
	);

	if ( &#039;display&#039; === $context ) {
		$fields[&#039;genre&#039;]            = __( &#039;Genre&#039; );
		$fields[&#039;year&#039;]             = __( &#039;Year&#039; );
		$fields[&#039;length_formatted&#039;] = _x( &#039;Length&#039;, &#039;video or audio&#039; );
	} elseif ( &#039;js&#039; === $context ) {
		$fields[&#039;bitrate&#039;]      = __( &#039;Bitrate&#039; );
		$fields[&#039;bitrate_mode&#039;] = __( &#039;Bitrate Mode&#039; );
	}

	/**
	 * Filters the editable list of keys to look up data from an attachment&#039;s metadata.
	 *
	 * @since 3.9.0
	 *
	 * @param array   $fields     Key/value pairs of field keys to labels.
	 * @param WP_Post $attachment Attachment object.
	 * @param string  $context    The context. Accepts &#039;edit&#039;, &#039;display&#039;. Default &#039;display&#039;.
	 */
	return apply_filters( &#039;wp_get_attachment_id3_keys&#039;, $fields, $attachment, $context );
}
/**
 * Builds the Audio shortcode output.
 *
 * This implements the functionality of the Audio Shortcode for displaying
 * WordPress mp3s in a post.
 *
 * @since 3.6.0
 *
 * @param array  $attr {
 *     Attributes of the audio shortcode.
 *
 *     @type string $src      URL to the source of the audio file. Default empty.
 *     @type string $loop     The &#039;loop&#039; attribute for the `&lt;audio&gt;` element. Default empty.
 *     @type string $autoplay The &#039;autoplay&#039; attribute for the `&lt;audio&gt;` element. Default empty.
 *     @type string $preload  The &#039;preload&#039; attribute for the `&lt;audio&gt;` element. Default &#039;none&#039;.
 *     @type string $class    The &#039;class&#039; attribute for the `&lt;audio&gt;` element. Default &#039;wp-audio-shortcode&#039;.
 *     @type string $style    The &#039;style&#039; attribute for the `&lt;audio&gt;` element. Default &#039;width: 100%;&#039;.
 * }
 * @param string $content Shortcode content.
 * @return string|void HTML content to display audio.
 */
function wp_audio_shortcode( $attr, $content = &#039;&#039; ) {
	$post_id = get_post() ? get_the_ID() : 0;

	static $instance = 0;
	$instance++;

	/**
	 * Filters the default audio shortcode output.
	 *
	 * If the filtered output isn&#039;t empty, it will be used instead of generating the default audio template.
	 *
	 * @since 3.6.0
	 *
	 * @param string $html     Empty variable to be replaced with shortcode markup.
	 * @param array  $attr     Attributes of the shortcode. @see wp_audio_shortcode()
	 * @param string $content  Shortcode content.
	 * @param int    $instance Unique numeric ID of this audio shortcode instance.
	 */
	$override = apply_filters( &#039;wp_audio_shortcode_override&#039;, &#039;&#039;, $attr, $content, $instance );

	if ( &#039;&#039; !== $override ) {
		return $override;
	}

	$audio = null;

	$default_types = wp_get_audio_extensions();
	$defaults_atts = array(
		&#039;src&#039;      =&gt; &#039;&#039;,
		&#039;loop&#039;     =&gt; &#039;&#039;,
		&#039;autoplay&#039; =&gt; &#039;&#039;,
		&#039;preload&#039;  =&gt; &#039;none&#039;,
		&#039;class&#039;    =&gt; &#039;wp-audio-shortcode&#039;,
		&#039;style&#039;    =&gt; &#039;width: 100%;&#039;,
	);
	foreach ( $default_types as $type ) {
		$defaults_atts[ $type ] = &#039;&#039;;
	}

	$atts = shortcode_atts( $defaults_atts, $attr, &#039;audio&#039; );

	$primary = false;
	if ( ! empty( $atts[&#039;src&#039;] ) ) {
		$type = wp_check_filetype( $atts[&#039;src&#039;], wp_get_mime_types() );

		if ( ! in_array( strtolower( $type[&#039;ext&#039;] ), $default_types, true ) ) {
			return sprintf( &#039;&lt;a class=&quot;wp-embedded-audio&quot; href=&quot;%s&quot;&gt;%s&lt;/a&gt;&#039;, esc_url( $atts[&#039;src&#039;] ), esc_html( $atts[&#039;src&#039;] ) );
		}

		$primary = true;
		array_unshift( $default_types, &#039;src&#039; );
	} else {
		foreach ( $default_types as $ext ) {
			if ( ! empty( $atts[ $ext ] ) ) {
				$type = wp_check_filetype( $atts[ $ext ], wp_get_mime_types() );

				if ( strtolower( $type[&#039;ext&#039;] ) === $ext ) {
					$primary = true;
				}
			}
		}
	}

	if ( ! $primary ) {
		$audios = get_attached_media( &#039;audio&#039;, $post_id );

		if ( empty( $audios ) ) {
			return;
		}

		$audio       = reset( $audios );
		$atts[&#039;src&#039;] = wp_get_attachment_url( $audio-&gt;ID );

		if ( empty( $atts[&#039;src&#039;] ) ) {
			return;
		}

		array_unshift( $default_types, &#039;src&#039; );
	}

	/**
	 * Filters the media library used for the audio shortcode.
	 *
	 * @since 3.6.0
	 *
	 * @param string $library Media library used for the audio shortcode.
	 */
	$library = apply_filters( &#039;wp_audio_shortcode_library&#039;, &#039;mediaelement&#039; );

	if ( &#039;mediaelement&#039; === $library &amp;&amp; did_action( &#039;init&#039; ) ) {
		wp_enqueue_style( &#039;wp-mediaelement&#039; );
		wp_enqueue_script( &#039;wp-mediaelement&#039; );
	}

	/**
	 * Filters the class attribute for the audio shortcode output container.
	 *
	 * @since 3.6.0
	 * @since 4.9.0 The `$atts` parameter was added.
	 *
	 * @param string $class CSS class or list of space-separated classes.
	 * @param array  $atts  Array of audio shortcode attributes.
	 */
	$atts[&#039;class&#039;] = apply_filters( &#039;wp_audio_shortcode_class&#039;, $atts[&#039;class&#039;], $atts );

	$html_atts = array(
		&#039;class&#039;    =&gt; $atts[&#039;class&#039;],
		&#039;id&#039;       =&gt; sprintf( &#039;audio-%d-%d&#039;, $post_id, $instance ),
		&#039;loop&#039;     =&gt; wp_validate_boolean( $atts[&#039;loop&#039;] ),
		&#039;autoplay&#039; =&gt; wp_validate_boolean( $atts[&#039;autoplay&#039;] ),
		&#039;preload&#039;  =&gt; $atts[&#039;preload&#039;],
		&#039;style&#039;    =&gt; $atts[&#039;style&#039;],
	);

	// These ones should just be omitted altogether if they are blank.
	foreach ( array( &#039;loop&#039;, &#039;autoplay&#039;, &#039;preload&#039; ) as $a ) {
		if ( empty( $html_atts[ $a ] ) ) {
			unset( $html_atts[ $a ] );
		}
	}

	$attr_strings = array();

	foreach ( $html_atts as $k =&gt; $v ) {
		$attr_strings[] = $k . &#039;=&quot;&#039; . esc_attr( $v ) . &#039;&quot;&#039;;
	}

	$html = &#039;&#039;;

	if ( &#039;mediaelement&#039; === $library &amp;&amp; 1 === $instance ) {
		$html .= &quot;&lt;!--[if lt IE 9]&gt;&lt;script&gt;document.createElement(&#039;audio&#039;);&lt;/script&gt;&lt;![endif]--&gt;\n&quot;;
	}

	$html .= sprintf( &#039;&lt;audio %s controls=&quot;controls&quot;&gt;&#039;, implode( &#039; &#039;, $attr_strings ) );

	$fileurl = &#039;&#039;;
	$source  = &#039;&lt;source type=&quot;%s&quot; src=&quot;%s&quot; /&gt;&#039;;

	foreach ( $default_types as $fallback ) {
		if ( ! empty( $atts[ $fallback ] ) ) {
			if ( empty( $fileurl ) ) {
				$fileurl = $atts[ $fallback ];
			}

			$type  = wp_check_filetype( $atts[ $fallback ], wp_get_mime_types() );
			$url   = add_query_arg( &#039;_&#039;, $instance, $atts[ $fallback ] );
			$html .= sprintf( $source, $type[&#039;type&#039;], esc_url( $url ) );
		}
	}

	if ( &#039;mediaelement&#039; === $library ) {
		$html .= wp_mediaelement_fallback( $fileurl );
	}

	$html .= &#039;&lt;/audio&gt;&#039;;

	/**
	 * Filters the audio shortcode output.
	 *
	 * @since 3.6.0
	 *
	 * @param string $html    Audio shortcode HTML output.
	 * @param array  $atts    Array of audio shortcode attributes.
	 * @param string $audio   Audio file.
	 * @param int    $post_id Post ID.
	 * @param string $library Media library used for the audio shortcode.
	 */
	return apply_filters( &#039;wp_audio_shortcode&#039;, $html, $atts, $audio, $post_id, $library );
}
add_shortcode( &#039;audio&#039;, &#039;wp_audio_shortcode&#039; );

/**
 * Returns a filtered list of supported video formats.
 *
 * @since 3.6.0
 *
 * @return string[] List of supported video formats.
 */
function wp_get_video_extensions() {
	/**
	 * Filters the list of supported video formats.
	 *
	 * @since 3.6.0
	 *
	 * @param string[] $extensions An array of supported video formats. Defaults are
	 *                             &#039;mp4&#039;, &#039;m4v&#039;, &#039;webm&#039;, &#039;ogv&#039;, &#039;flv&#039;.
	 */
	return apply_filters( &#039;wp_video_extensions&#039;, array( &#039;mp4&#039;, &#039;m4v&#039;, &#039;webm&#039;, &#039;ogv&#039;, &#039;flv&#039; ) );
}

/**
 * Builds the Video shortcode output.
 *
 * This implements the functionality of the Video Shortcode for displaying
 * WordPress mp4s in a post.
 *
 * @since 3.6.0
 *
 * @global int $content_width
 *
 * @param array  $attr {
 *     Attributes of the shortcode.
 *
 *     @type string $src      URL to the source of the video file. Default empty.
 *     @type int    $height   Height of the video embed in pixels. Default 360.
 *     @type int    $width    Width of the video embed in pixels. Default $content_width or 640.
 *     @type string $poster   The &#039;poster&#039; attribute for the `&lt;video&gt;` element. Default empty.
 *     @type string $loop     The &#039;loop&#039; attribute for the `&lt;video&gt;` element. Default empty.
 *     @type string $autoplay The &#039;autoplay&#039; attribute for the `&lt;video&gt;` element. Default empty.
 *     @type string $muted    The &#039;muted&#039; attribute for the `&lt;video&gt;` element. Default false.
 *     @type string $preload  The &#039;preload&#039; attribute for the `&lt;video&gt;` element.
 *                            Default &#039;metadata&#039;.
 *     @type string $class    The &#039;class&#039; attribute for the `&lt;video&gt;` element.
 *                            Default &#039;wp-video-shortcode&#039;.
 * }
 * @param string $content Shortcode content.
 * @return string|void HTML content to display video.
 */
function wp_video_shortcode( $attr, $content = &#039;&#039; ) {
	global $content_width;
	$post_id = get_post() ? get_the_ID() : 0;

	static $instance = 0;
	$instance++;

	/**
	 * Filters the default video shortcode output.
	 *
	 * If the filtered output isn&#039;t empty, it will be used instead of generating
	 * the default video template.
	 *
	 * @since 3.6.0
	 *
	 * @see wp_video_shortcode()
	 *
	 * @param string $html     Empty variable to be replaced with shortcode markup.
	 * @param array  $attr     Attributes of the shortcode. @see wp_video_shortcode()
	 * @param string $content  Video shortcode content.
	 * @param int    $instance Unique numeric ID of this video shortcode instance.
	 */
	$override = apply_filters( &#039;wp_video_shortcode_override&#039;, &#039;&#039;, $attr, $content, $instance );

	if ( &#039;&#039; !== $override ) {
		return $override;
	}

	$video = null;

	$default_types = wp_get_video_extensions();
	$defaults_atts = array(
		&#039;src&#039;      =&gt; &#039;&#039;,
		&#039;poster&#039;   =&gt; &#039;&#039;,
		&#039;loop&#039;     =&gt; &#039;&#039;,
		&#039;autoplay&#039; =&gt; &#039;&#039;,
		&#039;muted&#039;    =&gt; &#039;false&#039;,
		&#039;preload&#039;  =&gt; &#039;metadata&#039;,
		&#039;width&#039;    =&gt; 640,
		&#039;height&#039;   =&gt; 360,
		&#039;class&#039;    =&gt; &#039;wp-video-shortcode&#039;,
	);

	foreach ( $default_types as $type ) {
		$defaults_atts[ $type ] = &#039;&#039;;
	}

	$atts = shortcode_atts( $defaults_atts, $attr, &#039;video&#039; );

	if ( is_admin() ) {
		// Shrink the video so it isn&#039;t huge in the admin.
		if ( $atts[&#039;width&#039;] &gt; $defaults_atts[&#039;width&#039;] ) {
			$atts[&#039;height&#039;] = round( ( $atts[&#039;height&#039;] * $defaults_atts[&#039;width&#039;] ) / $atts[&#039;width&#039;] );
			$atts[&#039;width&#039;]  = $defaults_atts[&#039;width&#039;];
		}
	} else {
		// If the video is bigger than the theme.
		if ( ! empty( $content_width ) &amp;&amp; $atts[&#039;width&#039;] &gt; $content_width ) {
			$atts[&#039;height&#039;] = round( ( $atts[&#039;height&#039;] * $content_width ) / $atts[&#039;width&#039;] );
			$atts[&#039;width&#039;]  = $content_width;
		}
	}

	$is_vimeo      = false;
	$is_youtube    = false;
	$yt_pattern    = &#039;#^https?://(?:www\.)?(?:youtube\.com/watch|youtu\.be/)#&#039;;
	$vimeo_pattern = &#039;#^https?://(.+\.)?vimeo\.com/.*#&#039;;

	$primary = false;
	if ( ! empty( $atts[&#039;src&#039;] ) ) {
		$is_vimeo   = ( preg_match( $vimeo_pattern, $atts[&#039;src&#039;] ) );
		$is_youtube = ( preg_match( $yt_pattern, $atts[&#039;src&#039;] ) );

		if ( ! $is_youtube &amp;&amp; ! $is_vimeo ) {
			$type = wp_check_filetype( $atts[&#039;src&#039;], wp_get_mime_types() );

			if ( ! in_array( strtolower( $type[&#039;ext&#039;] ), $default_types, true ) ) {
				return sprintf( &#039;&lt;a class=&quot;wp-embedded-video&quot; href=&quot;%s&quot;&gt;%s&lt;/a&gt;&#039;, esc_url( $atts[&#039;src&#039;] ), esc_html( $atts[&#039;src&#039;] ) );
			}
		}

		if ( $is_vimeo ) {
			wp_enqueue_script( &#039;mediaelement-vimeo&#039; );
		}

		$primary = true;
		array_unshift( $default_types, &#039;src&#039; );
	} else {
		foreach ( $default_types as $ext ) {
			if ( ! empty( $atts[ $ext ] ) ) {
				$type = wp_check_filetype( $atts[ $ext ], wp_get_mime_types() );
				if ( strtolower( $type[&#039;ext&#039;] ) === $ext ) {
					$primary = true;
				}
			}
		}
	}

	if ( ! $primary ) {
		$videos = get_attached_media( &#039;video&#039;, $post_id );
		if ( empty( $videos ) ) {
			return;
		}

		$video       = reset( $videos );
		$atts[&#039;src&#039;] = wp_get_attachment_url( $video-&gt;ID );
		if ( empty( $atts[&#039;src&#039;] ) ) {
			return;
		}

		array_unshift( $default_types, &#039;src&#039; );
	}

	/**
	 * Filters the media library used for the video shortcode.
	 *
	 * @since 3.6.0
	 *
	 * @param string $library Media library used for the video shortcode.
	 */
	$library = apply_filters( &#039;wp_video_shortcode_library&#039;, &#039;mediaelement&#039; );
	if ( &#039;mediaelement&#039; === $library &amp;&amp; did_action( &#039;init&#039; ) ) {
		wp_enqueue_style( &#039;wp-mediaelement&#039; );
		wp_enqueue_script( &#039;wp-mediaelement&#039; );
		wp_enqueue_script( &#039;mediaelement-vimeo&#039; );
	}

	/*
	 * MediaElement.js has issues with some URL formats for Vimeo and YouTube,
	 * so update the URL to prevent the ME.js player from breaking.
	 */
	if ( &#039;mediaelement&#039; === $library ) {
		if ( $is_youtube ) {
			// Remove `feature` query arg and force SSL - see #40866.
			$atts[&#039;src&#039;] = remove_query_arg( &#039;feature&#039;, $atts[&#039;src&#039;] );
			$atts[&#039;src&#039;] = set_url_scheme( $atts[&#039;src&#039;], &#039;https&#039; );
		} elseif ( $is_vimeo ) {
			// Remove all query arguments and force SSL - see #40866.
			$parsed_vimeo_url = wp_parse_url( $atts[&#039;src&#039;] );
			$vimeo_src        = &#039;https://&#039; . $parsed_vimeo_url[&#039;host&#039;] . $parsed_vimeo_url[&#039;path&#039;];

			// Add loop param for mejs bug - see #40977, not needed after #39686.
			$loop        = $atts[&#039;loop&#039;] ? &#039;1&#039; : &#039;0&#039;;
			$atts[&#039;src&#039;] = add_query_arg( &#039;loop&#039;, $loop, $vimeo_src );
		}
	}

	/**
	 * Filters the class attribute for the video shortcode output container.
	 *
	 * @since 3.6.0
	 * @since 4.9.0 The `$atts` parameter was added.
	 *
	 * @param string $class CSS class or list of space-separated classes.
	 * @param array  $atts  Array of video shortcode attributes.
	 */
	$atts[&#039;class&#039;] = apply_filters( &#039;wp_video_shortcode_class&#039;, $atts[&#039;class&#039;], $atts );

	$html_atts = array(
		&#039;class&#039;    =&gt; $atts[&#039;class&#039;],
		&#039;id&#039;       =&gt; sprintf( &#039;video-%d-%d&#039;, $post_id, $instance ),
		&#039;width&#039;    =&gt; absint( $atts[&#039;width&#039;] ),
		&#039;height&#039;   =&gt; absint( $atts[&#039;height&#039;] ),
		&#039;poster&#039;   =&gt; esc_url( $atts[&#039;poster&#039;] ),
		&#039;loop&#039;     =&gt; wp_validate_boolean( $atts[&#039;loop&#039;] ),
		&#039;autoplay&#039; =&gt; wp_validate_boolean( $atts[&#039;autoplay&#039;] ),
		&#039;muted&#039;    =&gt; wp_validate_boolean( $atts[&#039;muted&#039;] ),
		&#039;preload&#039;  =&gt; $atts[&#039;preload&#039;],
	);

	// These ones should just be omitted altogether if they are blank.
	foreach ( array( &#039;poster&#039;, &#039;loop&#039;, &#039;autoplay&#039;, &#039;preload&#039;, &#039;muted&#039; ) as $a ) {
		if ( empty( $html_atts[ $a ] ) ) {
			unset( $html_atts[ $a ] );
		}
	}

	$attr_strings = array();
	foreach ( $html_atts as $k =&gt; $v ) {
		$attr_strings[] = $k . &#039;=&quot;&#039; . esc_attr( $v ) . &#039;&quot;&#039;;
	}

	$html = &#039;&#039;;

	if ( &#039;mediaelement&#039; === $library &amp;&amp; 1 === $instance ) {
		$html .= &quot;&lt;!--[if lt IE 9]&gt;&lt;script&gt;document.createElement(&#039;video&#039;);&lt;/script&gt;&lt;![endif]--&gt;\n&quot;;
	}

	$html .= sprintf( &#039;&lt;video %s controls=&quot;controls&quot;&gt;&#039;, implode( &#039; &#039;, $attr_strings ) );

	$fileurl = &#039;&#039;;
	$source  = &#039;&lt;source type=&quot;%s&quot; src=&quot;%s&quot; /&gt;&#039;;

	foreach ( $default_types as $fallback ) {
		if ( ! empty( $atts[ $fallback ] ) ) {
			if ( empty( $fileurl ) ) {
				$fileurl = $atts[ $fallback ];
			}
			if ( &#039;src&#039; === $fallback &amp;&amp; $is_youtube ) {
				$type = array( &#039;type&#039; =&gt; &#039;video/youtube&#039; );
			} elseif ( &#039;src&#039; === $fallback &amp;&amp; $is_vimeo ) {
				$type = array( &#039;type&#039; =&gt; &#039;video/vimeo&#039; );
			} else {
				$type = wp_check_filetype( $atts[ $fallback ], wp_get_mime_types() );
			}
			$url   = add_query_arg( &#039;_&#039;, $instance, $atts[ $fallback ] );
			$html .= sprintf( $source, $type[&#039;type&#039;], esc_url( $url ) );
		}
	}

	if ( ! empty( $content ) ) {
		if ( str_contains( $content, &quot;\n&quot; ) ) {
			$content = str_replace( array( &quot;\r\n&quot;, &quot;\n&quot;, &quot;\t&quot; ), &#039;&#039;, $content );
		}
		$html .= trim( $content );
	}

	if ( &#039;mediaelement&#039; === $library ) {
		$html .= wp_mediaelement_fallback( $fileurl );
	}
	$html .= &#039;&lt;/video&gt;&#039;;

	$width_rule = &#039;&#039;;
	if ( ! empty( $atts[&#039;width&#039;] ) ) {
		$width_rule = sprintf( &#039;width: %dpx;&#039;, $atts[&#039;width&#039;] );
	}
	$output = sprintf( &#039;&lt;div style=&quot;%s&quot; class=&quot;wp-video&quot;&gt;%s&lt;/div&gt;&#039;, $width_rule, $html );

	/**
	 * Filters the output of the video shortcode.
	 *
	 * @since 3.6.0
	 *
	 * @param string $output  Video shortcode HTML output.
	 * @param array  $atts    Array of video shortcode attributes.
	 * @param string $video   Video file.
	 * @param int    $post_id Post ID.
	 * @param string $library Media library used for the video shortcode.
	 */
	return apply_filters( &#039;wp_video_shortcode&#039;, $output, $atts, $video, $post_id, $library );
}
add_shortcode( &#039;video&#039;, &#039;wp_video_shortcode&#039; );

/**
 * Gets the previous image link that has the same post parent.
 *
 * @since 5.8.0
 *
 * @see get_adjacent_image_link()
 *
 * @param string|int[] $size Optional. Image size. Accepts any registered image size name, or an array
 *                           of width and height values in pixels (in that order). Default &#039;thumbnail&#039;.
 * @param string|false $text Optional. Link text. Default false.
 * @return string Markup for previous image link.
 */
function get_previous_image_link( $size = &#039;thumbnail&#039;, $text = false ) {
	return get_adjacent_image_link( true, $size, $text );
}

/**
 * Displays previous image link that has the same post parent.
 *
 * @since 2.5.0
 *
 * @param string|int[] $size Optional. Image size. Accepts any registered image size name, or an array
 *                           of width and height values in pixels (in that order). Default &#039;thumbnail&#039;.
 * @param string|false $text Optional. Link text. Default false.
 */
function previous_image_link( $size = &#039;thumbnail&#039;, $text = false ) {
	echo get_previous_image_link( $size, $text );
}

/**
 * Gets the next image link that has the same post parent.
 *
 * @since 5.8.0
 *
 * @see get_adjacent_image_link()
 *
 * @param string|int[] $size Optional. Image size. Accepts any registered image size name, or an array
 *                           of width and height values in pixels (in that order). Default &#039;thumbnail&#039;.
 * @param string|false $text Optional. Link text. Default false.
 * @return string Markup for next image link.
 */
function get_next_image_link( $size = &#039;thumbnail&#039;, $text = false ) {
	return get_adjacent_image_link( false, $size, $text );
}

/**
 * Displays next image link that has the same post parent.
 *
 * @since 2.5.0
 *
 * @param string|int[] $size Optional. Image size. Accepts any registered image size name, or an array
 *                           of width and height values in pixels (in that order). Default &#039;thumbnail&#039;.
 * @param string|false $text Optional. Link text. Default false.
 */
function next_image_link( $size = &#039;thumbnail&#039;, $text = false ) {
	echo get_next_image_link( $size, $text );
}

/**
 * Gets the next or previous image link that has the same post parent.
 *
 * Retrieves the current attachment object from the $post global.
 *
 * @since 5.8.0
 *
 * @param bool         $prev Optional. Whether to display the next (false) or previous (true) link. Default true.
 * @param string|int[] $size Optional. Image size. Accepts any registered image size name, or an array
 *                           of width and height values in pixels (in that order). Default &#039;thumbnail&#039;.
 * @param bool         $text Optional. Link text. Default false.
 * @return string Markup for image link.
 */
function get_adjacent_image_link( $prev = true, $size = &#039;thumbnail&#039;, $text = false ) {
	$post        = get_post();
	$attachments = array_values(
		get_children(
			array(
				&#039;post_parent&#039;    =&gt; $post-&gt;post_parent,
				&#039;post_status&#039;    =&gt; &#039;inherit&#039;,
				&#039;post_type&#039;      =&gt; &#039;attachment&#039;,
				&#039;post_mime_type&#039; =&gt; &#039;image&#039;,
				&#039;order&#039;          =&gt; &#039;ASC&#039;,
				&#039;orderby&#039;        =&gt; &#039;menu_order ID&#039;,
			)
		)
	);

	foreach ( $attachments as $k =&gt; $attachment ) {
		if ( (int) $attachment-&gt;ID === (int) $post-&gt;ID ) {
			break;
		}
	}

	$output        = &#039;&#039;;
	$attachment_id = 0;

	if ( $attachments ) {
		$k = $prev ? $k - 1 : $k + 1;

		if ( isset( $attachments[ $k ] ) ) {
			$attachment_id = $attachments[ $k ]-&gt;ID;
			$attr          = array( &#039;alt&#039; =&gt; get_the_title( $attachment_id ) );
			$output        = wp_get_attachment_link( $attachment_id, $size, true, false, $text, $attr );
		}
	}

	$adjacent = $prev ? &#039;previous&#039; : &#039;next&#039;;

	/**
	 * Filters the adjacent image link.
	 *
	 * The dynamic portion of the hook name, `$adjacent`, refers to the type of adjacency,
	 * either &#039;next&#039;, or &#039;previous&#039;.
	 *
	 * Possible hook names include:
	 *
	 *  - `next_image_link`
	 *  - `previous_image_link`
	 *
	 * @since 3.5.0
	 *
	 * @param string $output        Adjacent image HTML markup.
	 * @param int    $attachment_id Attachment ID
	 * @param string|int[] $size    Requested image size. Can be any registered image size name, or
	 *                              an array of width and height values in pixels (in that order).
	 * @param string $text          Link text.
	 */
	return apply_filters( &quot;{$adjacent}_image_link&quot;, $output, $attachment_id, $size, $text );
}

/**
 * Displays next or previous image link that has the same post parent.
 *
 * Retrieves the current attachment object from the $post global.
 *
 * @since 2.5.0
 *
 * @param bool         $prev Optional. Whether to display the next (false) or previous (true) link. Default true.
 * @param string|int[] $size Optional. Image size. Accepts any registered image size name, or an array
 *                           of width and height values in pixels (in that order). Default &#039;thumbnail&#039;.
 * @param bool         $text Optional. Link text. Default false.
 */
function adjacent_image_link( $prev = true, $size = &#039;thumbnail&#039;, $text = false ) {
	echo get_adjacent_image_link( $prev, $size, $text );
}

/**
 * Retrieves taxonomies attached to given the attachment.
 *
 * @since 2.5.0
 * @since 4.7.0 Introduced the `$output` parameter.
 *
 * @param int|array|object $attachment Attachment ID, data array, or data object.
 * @param string           $output     Output type. &#039;names&#039; to return an array of taxonomy names,
 *                                     or &#039;objects&#039; to return an array of taxonomy objects.
 *                                     Default is &#039;names&#039;.
 * @return string[]|WP_Taxonomy[] List of taxonomies or taxonomy names. Empty array on failure.
 */
function get_attachment_taxonomies( $attachment, $output = &#039;names&#039; ) {
	if ( is_int( $attachment ) ) {
		$attachment = get_post( $attachment );
	} elseif ( is_array( $attachment ) ) {
		$attachment = (object) $attachment;
	}

	if ( ! is_object( $attachment ) ) {
		return array();
	}

	$file     = get_attached_file( $attachment-&gt;ID );
	$filename = wp_basename( $file );

	$objects = array( &#039;attachment&#039; );

	if ( str_contains( $filename, &#039;.&#039; ) ) {
		$objects[] = &#039;attachment:&#039; . substr( $filename, strrpos( $filename, &#039;.&#039; ) + 1 );
	}

	if ( ! empty( $attachment-&gt;post_mime_type ) ) {
		$objects[] = &#039;attachment:&#039; . $attachment-&gt;post_mime_type;

		if ( str_contains( $attachment-&gt;post_mime_type, &#039;/&#039; ) ) {
			foreach ( explode( &#039;/&#039;, $attachment-&gt;post_mime_type ) as $token ) {
				if ( ! empty( $token ) ) {
					$objects[] = &quot;attachment:$token&quot;;
				}
			}
		}
	}

	$taxonomies = array();

	foreach ( $objects as $object ) {
		$taxes = get_object_taxonomies( $object, $output );

		if ( $taxes ) {
			$taxonomies = array_merge( $taxonomies, $taxes );
		}
	}

	if ( &#039;names&#039; === $output ) {
		$taxonomies = array_unique( $taxonomies );
	}

	return $taxonomies;
}

/**
 * Retrieves all of the taxonomies that are registered for attachments.
 *
 * Handles mime-type-specific taxonomies such as attachment:image and attachment:video.
 *
 * @since 3.5.0
 *
 * @see get_taxonomies()
 *
 * @param string $output Optional. The type of taxonomy output to return. Accepts &#039;names&#039; or &#039;objects&#039;.
 *                       Default &#039;names&#039;.
 * @return string[]|WP_Taxonomy[] Array of names or objects of registered taxonomies for attachments.
 */
function get_taxonomies_for_attachments( $output = &#039;names&#039; ) {
	$taxonomies = array();

	foreach ( get_taxonomies( array(), &#039;objects&#039; ) as $taxonomy ) {
		foreach ( $taxonomy-&gt;object_type as $object_type ) {
			if ( &#039;attachment&#039; === $object_type || str_starts_with( $object_type, &#039;attachment:&#039; ) ) {
				if ( &#039;names&#039; === $output ) {
					$taxonomies[] = $taxonomy-&gt;name;
				} else {
					$taxonomies[ $taxonomy-&gt;name ] = $taxonomy;
				}
				break;
			}
		}
	}

	return $taxonomies;
}

/**
 * Determines whether the value is an acceptable type for GD image functions.
 *
 * In PHP 8.0, the GD extension uses GdImage objects for its data structures.
 * This function checks if the passed value is either a GdImage object instance
 * or a resource of type `gd`. Any other type will return false.
 *
 * @since 5.6.0
 *
 * @param resource|GdImage|false $image A value to check the type for.
 * @return bool True if `$image` is either a GD image resource or a GdImage instance,
 *              false otherwise.
 */
function is_gd_image( $image ) {
	if ( $image instanceof GdImage
		|| is_resource( $image ) &amp;&amp; &#039;gd&#039; === get_resource_type( $image )
	) {
		return true;
	}

	return false;
}

/**
 * Creates a new GD image resource with transparency support.
 *
 * @todo Deprecate if possible.
 *
 * @since 2.9.0
 *
 * @param int $width  Image width in pixels.
 * @param int $height Image height in pixels.
 * @return resource|GdImage|false The GD image resource or GdImage instance on success.
 *                                False on failure.
 */
function wp_imagecreatetruecolor( $width, $height ) {
	$img = imagecreatetruecolor( $width, $height );

	if ( is_gd_image( $img )
		&amp;&amp; function_exists( &#039;imagealphablending&#039; ) &amp;&amp; function_exists( &#039;imagesavealpha&#039; )
	) {
		imagealphablending( $img, false );
		imagesavealpha( $img, true );
	}

	return $img;
}

/**
 * Based on a supplied width/height example, returns the biggest possible dimensions based on the max width/height.
 *
 * @since 2.9.0
 *
 * @see wp_constrain_dimensions()
 *
 * @param int $example_width  The width of an example embed.
 * @param int $example_height The height of an example embed.
 * @param int $max_width      The maximum allowed width.
 * @param int $max_height     The maximum allowed height.
 * @return int[] {
 *     An array of maximum width and height values.
 *
 *     @type int $0 The maximum width in pixels.
 *     @type int $1 The maximum height in pixels.
 * }
 */
function wp_expand_dimensions( $example_width, $example_height, $max_width, $max_height ) {
	$example_width  = (int) $example_width;
	$example_height = (int) $example_height;
	$max_width      = (int) $max_width;
	$max_height     = (int) $max_height;

	return wp_constrain_dimensions( $example_width * 1000000, $example_height * 1000000, $max_width, $max_height );
}

/**
 * Determines the maximum upload size allowed in php.ini.
 *
 * @since 2.5.0
 *
 * @return int Allowed upload size.
 */
function wp_max_upload_size() {
	$u_bytes = wp_convert_hr_to_bytes( ini_get( &#039;upload_max_filesize&#039; ) );
	$p_bytes = wp_convert_hr_to_bytes( ini_get( &#039;post_max_size&#039; ) );

	/**
	 * Filters the maximum upload size allowed in php.ini.
	 *
	 * @since 2.5.0
	 *
	 * @param int $size    Max upload size limit in bytes.
	 * @param int $u_bytes Maximum upload filesize in bytes.
	 * @param int $p_bytes Maximum size of POST data in bytes.
	 */
	return apply_filters( &#039;upload_size_limit&#039;, min( $u_bytes, $p_bytes ), $u_bytes, $p_bytes );
}

/**
 * Returns a WP_Image_Editor instance and loads file into it.
 *
 * @since 3.5.0
 *
 * @param string $path Path to the file to load.
 * @param array  $args Optional. Additional arguments for retrieving the image editor.
 *                     Default empty array.
 * @return WP_Image_Editor|WP_Error The WP_Image_Editor object on success,
 *                                  a WP_Error object otherwise.
 */
function wp_get_image_editor( $path, $args = array() ) {
	$args[&#039;path&#039;] = $path;

	// If the mime type is not set in args, try to extract and set it from the file.
	if ( ! isset( $args[&#039;mime_type&#039;] ) ) {
		$file_info = wp_check_filetype( $args[&#039;path&#039;] );

		/*
		 * If $file_info[&#039;type&#039;] is false, then we let the editor attempt to
		 * figure out the file type, rather than forcing a failure based on extension.
		 */
		if ( isset( $file_info ) &amp;&amp; $file_info[&#039;type&#039;] ) {
			$args[&#039;mime_type&#039;] = $file_info[&#039;type&#039;];
		}
	}

	// Check and set the output mime type mapped to the input type.
	if ( isset( $args[&#039;mime_type&#039;] ) ) {
		/** This filter is documented in wp-includes/class-wp-image-editor.php */
		$output_format = apply_filters( &#039;image_editor_output_format&#039;, array(), $path, $args[&#039;mime_type&#039;] );
		if ( isset( $output_format[ $args[&#039;mime_type&#039;] ] ) ) {
			$args[&#039;output_mime_type&#039;] = $output_format[ $args[&#039;mime_type&#039;] ];
		}
	}

	$implementation = _wp_image_editor_choose( $args );

	if ( $implementation ) {
		$editor = new $implementation( $path );
		$loaded = $editor-&gt;load();

		if ( is_wp_error( $loaded ) ) {
			return $loaded;
		}

		return $editor;
	}

	return new WP_Error( &#039;image_no_editor&#039;, __( &#039;No editor could be selected.&#039; ) );
}

/**
 * Tests whether there is an editor that supports a given mime type or methods.
 *
 * @since 3.5.0
 *
 * @param string|array $args Optional. Array of arguments to retrieve the image editor supports.
 *                           Default empty array.
 * @return bool True if an eligible editor is found; false otherwise.
 */
function wp_image_editor_supports( $args = array() ) {
	return (bool) _wp_image_editor_choose( $args );
}

/**
 * Tests which editors are capable of supporting the request.
 *
 * @ignore
 * @since 3.5.0
 *
 * @param array $args Optional. Array of arguments for choosing a capable editor. Default empty array.
 * @return string|false Class name for the first editor that claims to support the request.
 *                      False if no editor claims to support the request.
 */
function _wp_image_editor_choose( $args = array() ) {
	require_once ABSPATH . WPINC . &#039;/class-wp-image-editor.php&#039;;
	require_once ABSPATH . WPINC . &#039;/class-wp-image-editor-gd.php&#039;;
	require_once ABSPATH . WPINC . &#039;/class-wp-image-editor-imagick.php&#039;;
	/**
	 * Filters the list of image editing library classes.
	 *
	 * @since 3.5.0
	 *
	 * @param string[] $image_editors Array of available image editor class names. Defaults are
	 *                                &#039;WP_Image_Editor_Imagick&#039;, &#039;WP_Image_Editor_GD&#039;.
	 */
	$implementations = apply_filters( &#039;wp_image_editors&#039;, array( &#039;WP_Image_Editor_Imagick&#039;, &#039;WP_Image_Editor_GD&#039; ) );
	$supports_input  = false;

	foreach ( $implementations as $implementation ) {
		if ( ! call_user_func( array( $implementation, &#039;test&#039; ), $args ) ) {
			continue;
		}

		// Implementation should support the passed mime type.
		if ( isset( $args[&#039;mime_type&#039;] ) &amp;&amp;
			! call_user_func(
				array( $implementation, &#039;supports_mime_type&#039; ),
				$args[&#039;mime_type&#039;]
			) ) {
			continue;
		}

		// Implementation should support requested methods.
		if ( isset( $args[&#039;methods&#039;] ) &amp;&amp;
			array_diff( $args[&#039;methods&#039;], get_class_methods( $implementation ) ) ) {

			continue;
		}

		// Implementation should ideally support the output mime type as well if set and different than the passed type.
		if (
			isset( $args[&#039;mime_type&#039;] ) &amp;&amp;
			isset( $args[&#039;output_mime_type&#039;] ) &amp;&amp;
			$args[&#039;mime_type&#039;] !== $args[&#039;output_mime_type&#039;] &amp;&amp;
			! call_user_func( array( $implementation, &#039;supports_mime_type&#039; ), $args[&#039;output_mime_type&#039;] )
		) {
			/*
			 * This implementation supports the imput type but not the output type.
			 * Keep looking to see if we can find an implementation that supports both.
			 */
			$supports_input = $implementation;
			continue;
		}

		// Favor the implementation that supports both input and output mime types.
		return $implementation;
	}

	return $supports_input;
}

/**
 * Prints default Plupload arguments.
 *
 * @since 3.4.0
 */
function wp_plupload_default_settings() {
	$wp_scripts = wp_scripts();

	$data = $wp_scripts-&gt;get_data( &#039;wp-plupload&#039;, &#039;data&#039; );
	if ( $data &amp;&amp; str_contains( $data, &#039;_wpPluploadSettings&#039; ) ) {
		return;
	}

	$max_upload_size    = wp_max_upload_size();
	$allowed_extensions = array_keys( get_allowed_mime_types() );
	$extensions         = array();
	foreach ( $allowed_extensions as $extension ) {
		$extensions = array_merge( $extensions, explode( &#039;|&#039;, $extension ) );
	}

	/*
	 * Since 4.9 the `runtimes` setting is hardcoded in our version of Plupload to `html5,html4`,
	 * and the `flash_swf_url` and `silverlight_xap_url` are not used.
	 */
	$defaults = array(
		&#039;file_data_name&#039; =&gt; &#039;async-upload&#039;, // Key passed to $_FILE.
		&#039;url&#039;            =&gt; admin_url( &#039;async-upload.php&#039;, &#039;relative&#039; ),
		&#039;filters&#039;        =&gt; array(
			&#039;max_file_size&#039; =&gt; $max_upload_size . &#039;b&#039;,
			&#039;mime_types&#039;    =&gt; array( array( &#039;extensions&#039; =&gt; implode( &#039;,&#039;, $extensions ) ) ),
		),
	);

	/*
	 * Currently only iOS Safari supports multiple files uploading,
	 * but iOS 7.x has a bug that prevents uploading of videos when enabled.
	 * See #29602.
	 */
	if ( wp_is_mobile()
		&amp;&amp; str_contains( $_SERVER[&#039;HTTP_USER_AGENT&#039;], &#039;OS 7_&#039; )
		&amp;&amp; str_contains( $_SERVER[&#039;HTTP_USER_AGENT&#039;], &#039;like Mac OS X&#039; )
	) {
		$defaults[&#039;multi_selection&#039;] = false;
	}

	// Check if WebP images can be edited.
	if ( ! wp_image_editor_supports( array( &#039;mime_type&#039; =&gt; &#039;image/webp&#039; ) ) ) {
		$defaults[&#039;webp_upload_error&#039;] = true;
	}

	/**
	 * Filters the Plupload default settings.
	 *
	 * @since 3.4.0
	 *
	 * @param array $defaults Default Plupload settings array.
	 */
	$defaults = apply_filters( &#039;plupload_default_settings&#039;, $defaults );

	$params = array(
		&#039;action&#039; =&gt; &#039;upload-attachment&#039;,
	);

	/**
	 * Filters the Plupload default parameters.
	 *
	 * @since 3.4.0
	 *
	 * @param array $params Default Plupload parameters array.
	 */
	$params = apply_filters( &#039;plupload_default_params&#039;, $params );

	$params[&#039;_wpnonce&#039;] = wp_create_nonce( &#039;media-form&#039; );

	$defaults[&#039;multipart_params&#039;] = $params;

	$settings = array(
		&#039;defaults&#039;      =&gt; $defaults,
		&#039;browser&#039;       =&gt; array(
			&#039;mobile&#039;    =&gt; wp_is_mobile(),
			&#039;supported&#039; =&gt; _device_can_upload(),
		),
		&#039;limitExceeded&#039; =&gt; is_multisite() &amp;&amp; ! is_upload_space_available(),
	);

	$script = &#039;var _wpPluploadSettings = &#039; . wp_json_encode( $settings ) . &#039;;&#039;;

	if ( $data ) {
		$script = &quot;$data\n$script&quot;;
	}

	$wp_scripts-&gt;add_data( &#039;wp-plupload&#039;, &#039;data&#039;, $script );
}

/**
 * Prepares an attachment post object for JS, where it is expected
 * to be JSON-encoded and fit into an Attachment model.
 *
 * @since 3.5.0
 *
 * @param int|WP_Post $attachment Attachment ID or object.
 * @return array|void {
 *     Array of attachment details, or void if the parameter does not correspond to an attachment.
 *
 *     @type string $alt                   Alt text of the attachment.
 *     @type string $author                ID of the attachment author, as a string.
 *     @type string $authorName            Name of the attachment author.
 *     @type string $caption               Caption for the attachment.
 *     @type array  $compat                Containing item and meta.
 *     @type string $context               Context, whether it&#039;s used as the site icon for example.
 *     @type int    $date                  Uploaded date, timestamp in milliseconds.
 *     @type string $dateFormatted         Formatted date (e.g. June 29, 2018).
 *     @type string $description           Description of the attachment.
 *     @type string $editLink              URL to the edit page for the attachment.
 *     @type string $filename              File name of the attachment.
 *     @type string $filesizeHumanReadable Filesize of the attachment in human readable format (e.g. 1 MB).
 *     @type int    $filesizeInBytes       Filesize of the attachment in bytes.
 *     @type int    $height                If the attachment is an image, represents the height of the image in pixels.
 *     @type string $icon                  Icon URL of the attachment (e.g. /wp-includes/images/media/archive.png).
 *     @type int    $id                    ID of the attachment.
 *     @type string $link                  URL to the attachment.
 *     @type int    $menuOrder             Menu order of the attachment post.
 *     @type array  $meta                  Meta data for the attachment.
 *     @type string $mime                  Mime type of the attachment (e.g. image/jpeg or application/zip).
 *     @type int    $modified              Last modified, timestamp in milliseconds.
 *     @type string $name                  Name, same as title of the attachment.
 *     @type array  $nonces                Nonces for update, delete and edit.
 *     @type string $orientation           If the attachment is an image, represents the image orientation
 *                                         (landscape or portrait).
 *     @type array  $sizes                 If the attachment is an image, contains an array of arrays
 *                                         for the images sizes: thumbnail, medium, large, and full.
 *     @type string $status                Post status of the attachment (usually &#039;inherit&#039;).
 *     @type string $subtype               Mime subtype of the attachment (usually the last part, e.g. jpeg or zip).
 *     @type string $title                 Title of the attachment (usually slugified file name without the extension).
 *     @type string $type                  Type of the attachment (usually first part of the mime type, e.g. image).
 *     @type int    $uploadedTo            Parent post to which the attachment was uploaded.
 *     @type string $uploadedToLink        URL to the edit page of the parent post of the attachment.
 *     @type string $uploadedToTitle       Post title of the parent of the attachment.
 *     @type string $url                   Direct URL to the attachment file (from wp-content).
 *     @type int    $width                 If the attachment is an image, represents the width of the image in pixels.
 * }
 *
 */
function wp_prepare_attachment_for_js( $attachment ) {
	$attachment = get_post( $attachment );

	if ( ! $attachment ) {
		return;
	}

	if ( &#039;attachment&#039; !== $attachment-&gt;post_type ) {
		return;
	}

	$meta = wp_get_attachment_metadata( $attachment-&gt;ID );
	if ( str_contains( $attachment-&gt;post_mime_type, &#039;/&#039; ) ) {
		list( $type, $subtype ) = explode( &#039;/&#039;, $attachment-&gt;post_mime_type );
	} else {
		list( $type, $subtype ) = array( $attachment-&gt;post_mime_type, &#039;&#039; );
	}

	$attachment_url = wp_get_attachment_url( $attachment-&gt;ID );
	$base_url       = str_replace( wp_basename( $attachment_url ), &#039;&#039;, $attachment_url );

	$response = array(
		&#039;id&#039;            =&gt; $attachment-&gt;ID,
		&#039;title&#039;         =&gt; $attachment-&gt;post_title,
		&#039;filename&#039;      =&gt; wp_basename( get_attached_file( $attachment-&gt;ID ) ),
		&#039;url&#039;           =&gt; $attachment_url,
		&#039;link&#039;          =&gt; get_attachment_link( $attachment-&gt;ID ),
		&#039;alt&#039;           =&gt; get_post_meta( $attachment-&gt;ID, &#039;_wp_attachment_image_alt&#039;, true ),
		&#039;author&#039;        =&gt; $attachment-&gt;post_author,
		&#039;description&#039;   =&gt; $attachment-&gt;post_content,
		&#039;caption&#039;       =&gt; $attachment-&gt;post_excerpt,
		&#039;name&#039;          =&gt; $attachment-&gt;post_name,
		&#039;status&#039;        =&gt; $attachment-&gt;post_status,
		&#039;uploadedTo&#039;    =&gt; $attachment-&gt;post_parent,
		&#039;date&#039;          =&gt; strtotime( $attachment-&gt;post_date_gmt ) * 1000,
		&#039;modified&#039;      =&gt; strtotime( $attachment-&gt;post_modified_gmt ) * 1000,
		&#039;menuOrder&#039;     =&gt; $attachment-&gt;menu_order,
		&#039;mime&#039;          =&gt; $attachment-&gt;post_mime_type,
		&#039;type&#039;          =&gt; $type,
		&#039;subtype&#039;       =&gt; $subtype,
		&#039;icon&#039;          =&gt; wp_mime_type_icon( $attachment-&gt;ID ),
		&#039;dateFormatted&#039; =&gt; mysql2date( __( &#039;F j, Y&#039; ), $attachment-&gt;post_date ),
		&#039;nonces&#039;        =&gt; array(
			&#039;update&#039; =&gt; false,
			&#039;delete&#039; =&gt; false,
			&#039;edit&#039;   =&gt; false,
		),
		&#039;editLink&#039;      =&gt; false,
		&#039;meta&#039;          =&gt; false,
	);

	$author = new WP_User( $attachment-&gt;post_author );

	if ( $author-&gt;exists() ) {
		$author_name            = $author-&gt;display_name ? $author-&gt;display_name : $author-&gt;nickname;
		$response[&#039;authorName&#039;] = html_entity_decode( $author_name, ENT_QUOTES, get_bloginfo( &#039;charset&#039; ) );
		$response[&#039;authorLink&#039;] = get_edit_user_link( $author-&gt;ID );
	} else {
		$response[&#039;authorName&#039;] = __( &#039;(no author)&#039; );
	}

	if ( $attachment-&gt;post_parent ) {
		$post_parent = get_post( $attachment-&gt;post_parent );
		if ( $post_parent ) {
			$response[&#039;uploadedToTitle&#039;] = $post_parent-&gt;post_title ? $post_parent-&gt;post_title : __( &#039;(no title)&#039; );
			$response[&#039;uploadedToLink&#039;]  = get_edit_post_link( $attachment-&gt;post_parent, &#039;raw&#039; );
		}
	}

	$attached_file = get_attached_file( $attachment-&gt;ID );

	if ( isset( $meta[&#039;filesize&#039;] ) ) {
		$bytes = $meta[&#039;filesize&#039;];
	} elseif ( file_exists( $attached_file ) ) {
		$bytes = wp_filesize( $attached_file );
	} else {
		$bytes = &#039;&#039;;
	}

	if ( $bytes ) {
		$response[&#039;filesizeInBytes&#039;]       = $bytes;
		$response[&#039;filesizeHumanReadable&#039;] = size_format( $bytes );
	}

	$context             = get_post_meta( $attachment-&gt;ID, &#039;_wp_attachment_context&#039;, true );
	$response[&#039;context&#039;] = ( $context ) ? $context : &#039;&#039;;

	if ( current_user_can( &#039;edit_post&#039;, $attachment-&gt;ID ) ) {
		$response[&#039;nonces&#039;][&#039;update&#039;] = wp_create_nonce( &#039;update-post_&#039; . $attachment-&gt;ID );
		$response[&#039;nonces&#039;][&#039;edit&#039;]   = wp_create_nonce( &#039;image_editor-&#039; . $attachment-&gt;ID );
		$response[&#039;editLink&#039;]         = get_edit_post_link( $attachment-&gt;ID, &#039;raw&#039; );
	}

	if ( current_user_can( &#039;delete_post&#039;, $attachment-&gt;ID ) ) {
		$response[&#039;nonces&#039;][&#039;delete&#039;] = wp_create_nonce( &#039;delete-post_&#039; . $attachment-&gt;ID );
	}

	if ( $meta &amp;&amp; ( &#039;image&#039; === $type || ! empty( $meta[&#039;sizes&#039;] ) ) ) {
		$sizes = array();

		/** This filter is documented in wp-admin/includes/media.php */
		$possible_sizes = apply_filters(
			&#039;image_size_names_choose&#039;,
			array(
				&#039;thumbnail&#039; =&gt; __( &#039;Thumbnail&#039; ),
				&#039;medium&#039;    =&gt; __( &#039;Medium&#039; ),
				&#039;large&#039;     =&gt; __( &#039;Large&#039; ),
				&#039;full&#039;      =&gt; __( &#039;Full Size&#039; ),
			)
		);
		unset( $possible_sizes[&#039;full&#039;] );

		/*
		 * Loop through all potential sizes that may be chosen. Try to do this with some efficiency.
		 * First: run the image_downsize filter. If it returns something, we can use its data.
		 * If the filter does not return something, then image_downsize() is just an expensive way
		 * to check the image metadata, which we do second.
		 */
		foreach ( $possible_sizes as $size =&gt; $label ) {

			/** This filter is documented in wp-includes/media.php */
			$downsize = apply_filters( &#039;image_downsize&#039;, false, $attachment-&gt;ID, $size );

			if ( $downsize ) {
				if ( empty( $downsize[3] ) ) {
					continue;
				}

				$sizes[ $size ] = array(
					&#039;height&#039;      =&gt; $downsize[2],
					&#039;width&#039;       =&gt; $downsize[1],
					&#039;url&#039;         =&gt; $downsize[0],
					&#039;orientation&#039; =&gt; $downsize[2] &gt; $downsize[1] ? &#039;portrait&#039; : &#039;landscape&#039;,
				);
			} elseif ( isset( $meta[&#039;sizes&#039;][ $size ] ) ) {
				// Nothing from the filter, so consult image metadata if we have it.
				$size_meta = $meta[&#039;sizes&#039;][ $size ];

				/*
				 * We have the actual image size, but might need to further constrain it if content_width is narrower.
				 * Thumbnail, medium, and full sizes are also checked against the site&#039;s height/width options.
				 */
				list( $width, $height ) = image_constrain_size_for_editor( $size_meta[&#039;width&#039;], $size_meta[&#039;height&#039;], $size, &#039;edit&#039; );

				$sizes[ $size ] = array(
					&#039;height&#039;      =&gt; $height,
					&#039;width&#039;       =&gt; $width,
					&#039;url&#039;         =&gt; $base_url . $size_meta[&#039;file&#039;],
					&#039;orientation&#039; =&gt; $height &gt; $width ? &#039;portrait&#039; : &#039;landscape&#039;,
				);
			}
		}

		if ( &#039;image&#039; === $type ) {
			if ( ! empty( $meta[&#039;original_image&#039;] ) ) {
				$response[&#039;originalImageURL&#039;]  = wp_get_original_image_url( $attachment-&gt;ID );
				$response[&#039;originalImageName&#039;] = wp_basename( wp_get_original_image_path( $attachment-&gt;ID ) );
			}

			$sizes[&#039;full&#039;] = array( &#039;url&#039; =&gt; $attachment_url );

			if ( isset( $meta[&#039;height&#039;], $meta[&#039;width&#039;] ) ) {
				$sizes[&#039;full&#039;][&#039;height&#039;]      = $meta[&#039;height&#039;];
				$sizes[&#039;full&#039;][&#039;width&#039;]       = $meta[&#039;width&#039;];
				$sizes[&#039;full&#039;][&#039;orientation&#039;] = $meta[&#039;height&#039;] &gt; $meta[&#039;width&#039;] ? &#039;portrait&#039; : &#039;landscape&#039;;
			}

			$response = array_merge( $response, $sizes[&#039;full&#039;] );
		} elseif ( $meta[&#039;sizes&#039;][&#039;full&#039;][&#039;file&#039;] ) {
			$sizes[&#039;full&#039;] = array(
				&#039;url&#039;         =&gt; $base_url . $meta[&#039;sizes&#039;][&#039;full&#039;][&#039;file&#039;],
				&#039;height&#039;      =&gt; $meta[&#039;sizes&#039;][&#039;full&#039;][&#039;height&#039;],
				&#039;width&#039;       =&gt; $meta[&#039;sizes&#039;][&#039;full&#039;][&#039;width&#039;],
				&#039;orientation&#039; =&gt; $meta[&#039;sizes&#039;][&#039;full&#039;][&#039;height&#039;] &gt; $meta[&#039;sizes&#039;][&#039;full&#039;][&#039;width&#039;] ? &#039;portrait&#039; : &#039;landscape&#039;,
			);
		}

		$response = array_merge( $response, array( &#039;sizes&#039; =&gt; $sizes ) );
	}

	if ( $meta &amp;&amp; &#039;video&#039; === $type ) {
		if ( isset( $meta[&#039;width&#039;] ) ) {
			$response[&#039;width&#039;] = (int) $meta[&#039;width&#039;];
		}
		if ( isset( $meta[&#039;height&#039;] ) ) {
			$response[&#039;height&#039;] = (int) $meta[&#039;height&#039;];
		}
	}

	if ( $meta &amp;&amp; ( &#039;audio&#039; === $type || &#039;video&#039; === $type ) ) {
		if ( isset( $meta[&#039;length_formatted&#039;] ) ) {
			$response[&#039;fileLength&#039;]              = $meta[&#039;length_formatted&#039;];
			$response[&#039;fileLengthHumanReadable&#039;] = human_readable_duration( $meta[&#039;length_formatted&#039;] );
		}

		$response[&#039;meta&#039;] = array();
		foreach ( wp_get_attachment_id3_keys( $attachment, &#039;js&#039; ) as $key =&gt; $label ) {
			$response[&#039;meta&#039;][ $key ] = false;

			if ( ! empty( $meta[ $key ] ) ) {
				$response[&#039;meta&#039;][ $key ] = $meta[ $key ];
			}
		}

		$id = get_post_thumbnail_id( $attachment-&gt;ID );
		if ( ! empty( $id ) ) {
			list( $src, $width, $height ) = wp_get_attachment_image_src( $id, &#039;full&#039; );
			$response[&#039;image&#039;]            = compact( &#039;src&#039;, &#039;width&#039;, &#039;height&#039; );
			list( $src, $width, $height ) = wp_get_attachment_image_src( $id, &#039;thumbnail&#039; );
			$response[&#039;thumb&#039;]            = compact( &#039;src&#039;, &#039;width&#039;, &#039;height&#039; );
		} else {
			$src               = wp_mime_type_icon( $attachment-&gt;ID );
			$width             = 48;
			$height            = 64;
			$response[&#039;image&#039;] = compact( &#039;src&#039;, &#039;width&#039;, &#039;height&#039; );
			$response[&#039;thumb&#039;] = compact( &#039;src&#039;, &#039;width&#039;, &#039;height&#039; );
		}
	}

	if ( function_exists( &#039;get_compat_media_markup&#039; ) ) {
		$response[&#039;compat&#039;] = get_compat_media_markup( $attachment-&gt;ID, array( &#039;in_modal&#039; =&gt; true ) );
	}

	if ( function_exists( &#039;get_media_states&#039; ) ) {
		$media_states = get_media_states( $attachment );
		if ( ! empty( $media_states ) ) {
			$response[&#039;mediaStates&#039;] = implode( &#039;, &#039;, $media_states );
		}
	}

	/**
	 * Filters the attachment data prepared for JavaScript.
	 *
	 * @since 3.5.0
	 *
	 * @param array       $response   Array of prepared attachment data. @see wp_prepare_attachment_for_js().
	 * @param WP_Post     $attachment Attachment object.
	 * @param array|false $meta       Array of attachment meta data, or false if there is none.
	 */
	return apply_filters( &#039;wp_prepare_attachment_for_js&#039;, $response, $attachment, $meta );
}

/**
 * Enqueues all scripts, styles, settings, and templates necessary to use
 * all media JS APIs.
 *
 * @since 3.5.0
 *
 * @global int       $content_width
 * @global wpdb      $wpdb          WordPress database abstraction object.
 * @global WP_Locale $wp_locale     WordPress date and time locale object.
 *
 * @param array $args {
 *     Arguments for enqueuing media scripts.
 *
 *     @type int|WP_Post $post Post ID or post object.
 * }
 */
function wp_enqueue_media( $args = array() ) {
	// Enqueue me just once per page, please.
	if ( did_action( &#039;wp_enqueue_media&#039; ) ) {
		return;
	}

	global $content_width, $wpdb, $wp_locale;

	$defaults = array(
		&#039;post&#039; =&gt; null,
	);
	$args     = wp_parse_args( $args, $defaults );

	/*
	 * We&#039;re going to pass the old thickbox media tabs to `media_upload_tabs`
	 * to ensure plugins will work. We will then unset those tabs.
	 */
	$tabs = array(
		// handler action suffix =&gt; tab label
		&#039;type&#039;     =&gt; &#039;&#039;,
		&#039;type_url&#039; =&gt; &#039;&#039;,
		&#039;gallery&#039;  =&gt; &#039;&#039;,
		&#039;library&#039;  =&gt; &#039;&#039;,
	);

	/** This filter is documented in wp-admin/includes/media.php */
	$tabs = apply_filters( &#039;media_upload_tabs&#039;, $tabs );
	unset( $tabs[&#039;type&#039;], $tabs[&#039;type_url&#039;], $tabs[&#039;gallery&#039;], $tabs[&#039;library&#039;] );

	$props = array(
		&#039;link&#039;  =&gt; get_option( &#039;image_default_link_type&#039; ), // DB default is &#039;file&#039;.
		&#039;align&#039; =&gt; get_option( &#039;image_default_align&#039; ),     // Empty default.
		&#039;size&#039;  =&gt; get_option( &#039;image_default_size&#039; ),      // Empty default.
	);

	$exts      = array_merge( wp_get_audio_extensions(), wp_get_video_extensions() );
	$mimes     = get_allowed_mime_types();
	$ext_mimes = array();
	foreach ( $exts as $ext ) {
		foreach ( $mimes as $ext_preg =&gt; $mime_match ) {
			if ( preg_match( &#039;#&#039; . $ext . &#039;#i&#039;, $ext_preg ) ) {
				$ext_mimes[ $ext ] = $mime_match;
				break;
			}
		}
	}

	/**
	 * Allows showing or hiding the &quot;Create Audio Playlist&quot; button in the media library.
	 *
	 * By default, the &quot;Create Audio Playlist&quot; button will always be shown in
	 * the media library.  If this filter returns `null`, a query will be run
	 * to determine whether the media library contains any audio items.  This
	 * was the default behavior prior to version 4.8.0, but this query is
	 * expensive for large media libraries.
	 *
	 * @since 4.7.4
	 * @since 4.8.0 The filter&#039;s default value is `true` rather than `null`.
	 *
	 * @link https://core.trac.wordpress.org/ticket/31071
	 *
	 * @param bool|null $show Whether to show the button, or `null` to decide based
	 *                        on whether any audio files exist in the media library.
	 */
	$show_audio_playlist = apply_filters( &#039;media_library_show_audio_playlist&#039;, true );
	if ( null === $show_audio_playlist ) {
		$show_audio_playlist = $wpdb-&gt;get_var(
			&quot;SELECT ID
			FROM $wpdb-&gt;posts
			WHERE post_type = &#039;attachment&#039;
			AND post_mime_type LIKE &#039;audio%&#039;
			LIMIT 1&quot;
		);
	}

	/**
	 * Allows showing or hiding the &quot;Create Video Playlist&quot; button in the media library.
	 *
	 * By default, the &quot;Create Video Playlist&quot; button will always be shown in
	 * the media library.  If this filter returns `null`, a query will be run
	 * to determine whether the media library contains any video items.  This
	 * was the default behavior prior to version 4.8.0, but this query is
	 * expensive for large media libraries.
	 *
	 * @since 4.7.4
	 * @since 4.8.0 The filter&#039;s default value is `true` rather than `null`.
	 *
	 * @link https://core.trac.wordpress.org/ticket/31071
	 *
	 * @param bool|null $show Whether to show the button, or `null` to decide based
	 *                        on whether any video files exist in the media library.
	 */
	$show_video_playlist = apply_filters( &#039;media_library_show_video_playlist&#039;, true );
	if ( null === $show_video_playlist ) {
		$show_video_playlist = $wpdb-&gt;get_var(
			&quot;SELECT ID
			FROM $wpdb-&gt;posts
			WHERE post_type = &#039;attachment&#039;
			AND post_mime_type LIKE &#039;video%&#039;
			LIMIT 1&quot;
		);
	}

	/**
	 * Allows overriding the list of months displayed in the media library.
	 *
	 * By default (if this filter does not return an array), a query will be
	 * run to determine the months that have media items.  This query can be
	 * expensive for large media libraries, so it may be desirable for sites to
	 * override this behavior.
	 *
	 * @since 4.7.4
	 *
	 * @link https://core.trac.wordpress.org/ticket/31071
	 *
	 * @param stdClass[]|null $months An array of objects with `month` and `year`
	 *                                properties, or `null` for default behavior.
	 */
	$months = apply_filters( &#039;media_library_months_with_files&#039;, null );
	if ( ! is_array( $months ) ) {
		$months = $wpdb-&gt;get_results(
			$wpdb-&gt;prepare(
				&quot;SELECT DISTINCT YEAR( post_date ) AS year, MONTH( post_date ) AS month
				FROM $wpdb-&gt;posts
				WHERE post_type = %s
				ORDER BY post_date DESC&quot;,
				&#039;attachment&#039;
			)
		);
	}
	foreach ( $months as $month_year ) {
		$month_year-&gt;text = sprintf(
			/* translators: 1: Month, 2: Year. */
			__( &#039;%1$s %2$d&#039; ),
			$wp_locale-&gt;get_month( $month_year-&gt;month ),
			$month_year-&gt;year
		);
	}

	/**
	 * Filters whether the Media Library grid has infinite scrolling. Default `false`.
	 *
	 * @since 5.8.0
	 *
	 * @param bool $infinite Whether the Media Library grid has infinite scrolling.
	 */
	$infinite_scrolling = apply_filters( &#039;media_library_infinite_scrolling&#039;, false );

	$settings = array(
		&#039;tabs&#039;              =&gt; $tabs,
		&#039;tabUrl&#039;            =&gt; add_query_arg( array( &#039;chromeless&#039; =&gt; true ), admin_url( &#039;media-upload.php&#039; ) ),
		&#039;mimeTypes&#039;         =&gt; wp_list_pluck( get_post_mime_types(), 0 ),
		/** This filter is documented in wp-admin/includes/media.php */
		&#039;captions&#039;          =&gt; ! apply_filters( &#039;disable_captions&#039;, &#039;&#039; ),
		&#039;nonce&#039;             =&gt; array(
			&#039;sendToEditor&#039;           =&gt; wp_create_nonce( &#039;media-send-to-editor&#039; ),
			&#039;setAttachmentThumbnail&#039; =&gt; wp_create_nonce( &#039;set-attachment-thumbnail&#039; ),
		),
		&#039;post&#039;              =&gt; array(
			&#039;id&#039; =&gt; 0,
		),
		&#039;defaultProps&#039;      =&gt; $props,
		&#039;attachmentCounts&#039;  =&gt; array(
			&#039;audio&#039; =&gt; ( $show_audio_playlist ) ? 1 : 0,
			&#039;video&#039; =&gt; ( $show_video_playlist ) ? 1 : 0,
		),
		&#039;oEmbedProxyUrl&#039;    =&gt; rest_url( &#039;oembed/1.0/proxy&#039; ),
		&#039;embedExts&#039;         =&gt; $exts,
		&#039;embedMimes&#039;        =&gt; $ext_mimes,
		&#039;contentWidth&#039;      =&gt; $content_width,
		&#039;months&#039;            =&gt; $months,
		&#039;mediaTrash&#039;        =&gt; MEDIA_TRASH ? 1 : 0,
		&#039;infiniteScrolling&#039; =&gt; ( $infinite_scrolling ) ? 1 : 0,
	);

	$post = null;
	if ( isset( $args[&#039;post&#039;] ) ) {
		$post             = get_post( $args[&#039;post&#039;] );
		$settings[&#039;post&#039;] = array(
			&#039;id&#039;    =&gt; $post-&gt;ID,
			&#039;nonce&#039; =&gt; wp_create_nonce( &#039;update-post_&#039; . $post-&gt;ID ),
		);

		$thumbnail_support = current_theme_supports( &#039;post-thumbnails&#039;, $post-&gt;post_type ) &amp;&amp; post_type_supports( $post-&gt;post_type, &#039;thumbnail&#039; );
		if ( ! $thumbnail_support &amp;&amp; &#039;attachment&#039; === $post-&gt;post_type &amp;&amp; $post-&gt;post_mime_type ) {
			if ( wp_attachment_is( &#039;audio&#039;, $post ) ) {
				$thumbnail_support = post_type_supports( &#039;attachment:audio&#039;, &#039;thumbnail&#039; ) || current_theme_supports( &#039;post-thumbnails&#039;, &#039;attachment:audio&#039; );
			} elseif ( wp_attachment_is( &#039;video&#039;, $post ) ) {
				$thumbnail_support = post_type_supports( &#039;attachment:video&#039;, &#039;thumbnail&#039; ) || current_theme_supports( &#039;post-thumbnails&#039;, &#039;attachment:video&#039; );
			}
		}

		if ( $thumbnail_support ) {
			$featured_image_id                   = get_post_meta( $post-&gt;ID, &#039;_thumbnail_id&#039;, true );
			$settings[&#039;post&#039;][&#039;featuredImageId&#039;] = $featured_image_id ? $featured_image_id : -1;
		}
	}

	if ( $post ) {
		$post_type_object = get_post_type_object( $post-&gt;post_type );
	} else {
		$post_type_object = get_post_type_object( &#039;post&#039; );
	}

	$strings = array(
		// Generic.
		&#039;mediaFrameDefaultTitle&#039;      =&gt; __( &#039;Media&#039; ),
		&#039;url&#039;                         =&gt; __( &#039;URL&#039; ),
		&#039;addMedia&#039;                    =&gt; __( &#039;Add media&#039; ),
		&#039;search&#039;                      =&gt; __( &#039;Search&#039; ),
		&#039;select&#039;                      =&gt; __( &#039;Select&#039; ),
		&#039;cancel&#039;                      =&gt; __( &#039;Cancel&#039; ),
		&#039;update&#039;                      =&gt; __( &#039;Update&#039; ),
		&#039;replace&#039;                     =&gt; __( &#039;Replace&#039; ),
		&#039;remove&#039;                      =&gt; __( &#039;Remove&#039; ),
		&#039;back&#039;                        =&gt; __( &#039;Back&#039; ),
		/*
		 * translators: This is a would-be plural string used in the media manager.
		 * If there is not a word you can use in your language to avoid issues with the
		 * lack of plural support here, turn it into &quot;selected: %d&quot; then translate it.
		 */
		&#039;selected&#039;                    =&gt; __( &#039;%d selected&#039; ),
		&#039;dragInfo&#039;                    =&gt; __( &#039;Drag and drop to reorder media files.&#039; ),

		// Upload.
		&#039;uploadFilesTitle&#039;            =&gt; __( &#039;Upload files&#039; ),
		&#039;uploadImagesTitle&#039;           =&gt; __( &#039;Upload images&#039; ),

		// Library.
		&#039;mediaLibraryTitle&#039;           =&gt; __( &#039;Media Library&#039; ),
		&#039;insertMediaTitle&#039;            =&gt; __( &#039;Add media&#039; ),
		&#039;createNewGallery&#039;            =&gt; __( &#039;Create a new gallery&#039; ),
		&#039;createNewPlaylist&#039;           =&gt; __( &#039;Create a new playlist&#039; ),
		&#039;createNewVideoPlaylist&#039;      =&gt; __( &#039;Create a new video playlist&#039; ),
		&#039;returnToLibrary&#039;             =&gt; __( &#039;&amp;#8592; Go to library&#039; ),
		&#039;allMediaItems&#039;               =&gt; __( &#039;All media items&#039; ),
		&#039;allDates&#039;                    =&gt; __( &#039;All dates&#039; ),
		&#039;noItemsFound&#039;                =&gt; __( &#039;No items found.&#039; ),
		&#039;insertIntoPost&#039;              =&gt; $post_type_object-&gt;labels-&gt;insert_into_item,
		&#039;unattached&#039;                  =&gt; _x( &#039;Unattached&#039;, &#039;media items&#039; ),
		&#039;mine&#039;                        =&gt; _x( &#039;Mine&#039;, &#039;media items&#039; ),
		&#039;trash&#039;                       =&gt; _x( &#039;Trash&#039;, &#039;noun&#039; ),
		&#039;uploadedToThisPost&#039;          =&gt; $post_type_object-&gt;labels-&gt;uploaded_to_this_item,
		&#039;warnDelete&#039;                  =&gt; __( &quot;You are about to permanently delete this item from your site.\nThis action cannot be undone.\n &#039;Cancel&#039; to stop, &#039;OK&#039; to delete.&quot; ),
		&#039;warnBulkDelete&#039;              =&gt; __( &quot;You are about to permanently delete these items from your site.\nThis action cannot be undone.\n &#039;Cancel&#039; to stop, &#039;OK&#039; to delete.&quot; ),
		&#039;warnBulkTrash&#039;               =&gt; __( &quot;You are about to trash these items.\n  &#039;Cancel&#039; to stop, &#039;OK&#039; to delete.&quot; ),
		&#039;bulkSelect&#039;                  =&gt; __( &#039;Bulk select&#039; ),
		&#039;trashSelected&#039;               =&gt; __( &#039;Move to Trash&#039; ),
		&#039;restoreSelected&#039;             =&gt; __( &#039;Restore from Trash&#039; ),
		&#039;deletePermanently&#039;           =&gt; __( &#039;Delete permanently&#039; ),
		&#039;errorDeleting&#039;               =&gt; __( &#039;Error in deleting the attachment.&#039; ),
		&#039;apply&#039;                       =&gt; __( &#039;Apply&#039; ),
		&#039;filterByDate&#039;                =&gt; __( &#039;Filter by date&#039; ),
		&#039;filterByType&#039;                =&gt; __( &#039;Filter by type&#039; ),
		&#039;searchLabel&#039;                 =&gt; __( &#039;Search&#039; ),
		&#039;searchMediaLabel&#039;            =&gt; __( &#039;Search media&#039; ),          // Backward compatibility pre-5.3.
		&#039;searchMediaPlaceholder&#039;      =&gt; __( &#039;Search media items...&#039; ), // Placeholder (no ellipsis), backward compatibility pre-5.3.
		/* translators: %d: Number of attachments found in a search. */
		&#039;mediaFound&#039;                  =&gt; __( &#039;Number of media items found: %d&#039; ),
		&#039;noMedia&#039;                     =&gt; __( &#039;No media items found.&#039; ),
		&#039;noMediaTryNewSearch&#039;         =&gt; __( &#039;No media items found. Try a different search.&#039; ),

		// Library Details.
		&#039;attachmentDetails&#039;           =&gt; __( &#039;Attachment details&#039; ),

		// From URL.
		&#039;insertFromUrlTitle&#039;          =&gt; __( &#039;Insert from URL&#039; ),

		// Featured Images.
		&#039;setFeaturedImageTitle&#039;       =&gt; $post_type_object-&gt;labels-&gt;featured_image,
		&#039;setFeaturedImage&#039;            =&gt; $post_type_object-&gt;labels-&gt;set_featured_image,

		// Gallery.
		&#039;createGalleryTitle&#039;          =&gt; __( &#039;Create gallery&#039; ),
		&#039;editGalleryTitle&#039;            =&gt; __( &#039;Edit gallery&#039; ),
		&#039;cancelGalleryTitle&#039;          =&gt; __( &#039;&amp;#8592; Cancel gallery&#039; ),
		&#039;insertGallery&#039;               =&gt; __( &#039;Insert gallery&#039; ),
		&#039;updateGallery&#039;               =&gt; __( &#039;Update gallery&#039; ),
		&#039;addToGallery&#039;                =&gt; __( &#039;Add to gallery&#039; ),
		&#039;addToGalleryTitle&#039;           =&gt; __( &#039;Add to gallery&#039; ),
		&#039;reverseOrder&#039;                =&gt; __( &#039;Reverse order&#039; ),

		// Edit Image.
		&#039;imageDetailsTitle&#039;           =&gt; __( &#039;Image details&#039; ),
		&#039;imageReplaceTitle&#039;           =&gt; __( &#039;Replace image&#039; ),
		&#039;imageDetailsCancel&#039;          =&gt; __( &#039;Cancel edit&#039; ),
		&#039;editImage&#039;                   =&gt; __( &#039;Edit image&#039; ),

		// Crop Image.
		&#039;chooseImage&#039;                 =&gt; __( &#039;Choose image&#039; ),
		&#039;selectAndCrop&#039;               =&gt; __( &#039;Select and crop&#039; ),
		&#039;skipCropping&#039;                =&gt; __( &#039;Skip cropping&#039; ),
		&#039;cropImage&#039;                   =&gt; __( &#039;Crop image&#039; ),
		&#039;cropYourImage&#039;               =&gt; __( &#039;Crop your image&#039; ),
		&#039;cropping&#039;                    =&gt; __( &#039;Cropping&amp;hellip;&#039; ),
		/* translators: 1: Suggested width number, 2: Suggested height number. */
		&#039;suggestedDimensions&#039;         =&gt; __( &#039;Suggested image dimensions: %1$s by %2$s pixels.&#039; ),
		&#039;cropError&#039;                   =&gt; __( &#039;There has been an error cropping your image.&#039; ),

		// Edit Audio.
		&#039;audioDetailsTitle&#039;           =&gt; __( &#039;Audio details&#039; ),
		&#039;audioReplaceTitle&#039;           =&gt; __( &#039;Replace audio&#039; ),
		&#039;audioAddSourceTitle&#039;         =&gt; __( &#039;Add audio source&#039; ),
		&#039;audioDetailsCancel&#039;          =&gt; __( &#039;Cancel edit&#039; ),

		// Edit Video.
		&#039;videoDetailsTitle&#039;           =&gt; __( &#039;Video details&#039; ),
		&#039;videoReplaceTitle&#039;           =&gt; __( &#039;Replace video&#039; ),
		&#039;videoAddSourceTitle&#039;         =&gt; __( &#039;Add video source&#039; ),
		&#039;videoDetailsCancel&#039;          =&gt; __( &#039;Cancel edit&#039; ),
		&#039;videoSelectPosterImageTitle&#039; =&gt; __( &#039;Select poster image&#039; ),
		&#039;videoAddTrackTitle&#039;          =&gt; __( &#039;Add subtitles&#039; ),

		// Playlist.
		&#039;playlistDragInfo&#039;            =&gt; __( &#039;Drag and drop to reorder tracks.&#039; ),
		&#039;createPlaylistTitle&#039;         =&gt; __( &#039;Create audio playlist&#039; ),
		&#039;editPlaylistTitle&#039;           =&gt; __( &#039;Edit audio playlist&#039; ),
		&#039;cancelPlaylistTitle&#039;         =&gt; __( &#039;&amp;#8592; Cancel audio playlist&#039; ),
		&#039;insertPlaylist&#039;              =&gt; __( &#039;Insert audio playlist&#039; ),
		&#039;updatePlaylist&#039;              =&gt; __( &#039;Update audio playlist&#039; ),
		&#039;addToPlaylist&#039;               =&gt; __( &#039;Add to audio playlist&#039; ),
		&#039;addToPlaylistTitle&#039;          =&gt; __( &#039;Add to Audio Playlist&#039; ),

		// Video Playlist.
		&#039;videoPlaylistDragInfo&#039;       =&gt; __( &#039;Drag and drop to reorder videos.&#039; ),
		&#039;createVideoPlaylistTitle&#039;    =&gt; __( &#039;Create video playlist&#039; ),
		&#039;editVideoPlaylistTitle&#039;      =&gt; __( &#039;Edit video playlist&#039; ),
		&#039;cancelVideoPlaylistTitle&#039;    =&gt; __( &#039;&amp;#8592; Cancel video playlist&#039; ),
		&#039;insertVideoPlaylist&#039;         =&gt; __( &#039;Insert video playlist&#039; ),
		&#039;updateVideoPlaylist&#039;         =&gt; __( &#039;Update video playlist&#039; ),
		&#039;addToVideoPlaylist&#039;          =&gt; __( &#039;Add to video playlist&#039; ),
		&#039;addToVideoPlaylistTitle&#039;     =&gt; __( &#039;Add to video Playlist&#039; ),

		// Headings.
		&#039;filterAttachments&#039;           =&gt; __( &#039;Filter media&#039; ),
		&#039;attachmentsList&#039;             =&gt; __( &#039;Media list&#039; ),
	);

	/**
	 * Filters the media view settings.
	 *
	 * @since 3.5.0
	 *
	 * @param array   $settings List of media view settings.
	 * @param WP_Post $post     Post object.
	 */
	$settings = apply_filters( &#039;media_view_settings&#039;, $settings, $post );

	/**
	 * Filters the media view strings.
	 *
	 * @since 3.5.0
	 *
	 * @param string[] $strings Array of media view strings keyed by the name they&#039;ll be referenced by in JavaScript.
	 * @param WP_Post  $post    Post object.
	 */
	$strings = apply_filters( &#039;media_view_strings&#039;, $strings, $post );

	$strings[&#039;settings&#039;] = $settings;

	/*
	 * Ensure we enqueue media-editor first, that way media-views
	 * is registered internally before we try to localize it. See #24724.
	 */
	wp_enqueue_script( &#039;media-editor&#039; );
	wp_localize_script( &#039;media-views&#039;, &#039;_wpMediaViewsL10n&#039;, $strings );

	wp_enqueue_script( &#039;media-audiovideo&#039; );
	wp_enqueue_style( &#039;media-views&#039; );
	if ( is_admin() ) {
		wp_enqueue_script( &#039;mce-view&#039; );
		wp_enqueue_script( &#039;image-edit&#039; );
	}
	wp_enqueue_style( &#039;imgareaselect&#039; );
	wp_plupload_default_settings();

	require_once ABSPATH . WPINC . &#039;/media-template.php&#039;;
	add_action( &#039;admin_footer&#039;, &#039;wp_print_media_templates&#039; );
	add_action( &#039;wp_footer&#039;, &#039;wp_print_media_templates&#039; );
	add_action( &#039;customize_controls_print_footer_scripts&#039;, &#039;wp_print_media_templates&#039; );

	/**
	 * Fires at the conclusion of wp_enqueue_media().
	 *
	 * @since 3.5.0
	 */
	do_action( &#039;wp_enqueue_media&#039; );
}

/**
 * Retrieves media attached to the passed post.
 *
 * @since 3.6.0
 *
 * @param string      $type Mime type.
 * @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global $post.
 * @return WP_Post[] Array of media attached to the given post.
 */
function get_attached_media( $type, $post = 0 ) {
	$post = get_post( $post );

	if ( ! $post ) {
		return array();
	}

	$args = array(
		&#039;post_parent&#039;    =&gt; $post-&gt;ID,
		&#039;post_type&#039;      =&gt; &#039;attachment&#039;,
		&#039;post_mime_type&#039; =&gt; $type,
		&#039;posts_per_page&#039; =&gt; -1,
		&#039;orderby&#039;        =&gt; &#039;menu_order&#039;,
		&#039;order&#039;          =&gt; &#039;ASC&#039;,
	);

	/**
	 * Filters arguments used to retrieve media attached to the given post.
	 *
	 * @since 3.6.0
	 *
	 * @param array   $args Post query arguments.
	 * @param string  $type Mime type of the desired media.
	 * @param WP_Post $post Post object.
	 */
	$args = apply_filters( &#039;get_attached_media_args&#039;, $args, $type, $post );

	$children = get_children( $args );

	/**
	 * Filters the list of media attached to the given post.
	 *
	 * @since 3.6.0
	 *
	 * @param WP_Post[] $children Array of media attached to the given post.
	 * @param string    $type     Mime type of the media desired.
	 * @param WP_Post   $post     Post object.
	 */
	return (array) apply_filters( &#039;get_attached_media&#039;, $children, $type, $post );
}

/**
 * Checks the HTML content for an audio, video, object, embed, or iframe tags.
 *
 * @since 3.6.0
 *
 * @param string   $content A string of HTML which might contain media elements.
 * @param string[] $types   An array of media types: &#039;audio&#039;, &#039;video&#039;, &#039;object&#039;, &#039;embed&#039;, or &#039;iframe&#039;.
 * @return string[] Array of found HTML media elements.
 */
function get_media_embedded_in_content( $content, $types = null ) {
	$html = array();

	/**
	 * Filters the embedded media types that are allowed to be returned from the content blob.
	 *
	 * @since 4.2.0
	 *
	 * @param string[] $allowed_media_types An array of allowed media types. Default media types are
	 *                                      &#039;audio&#039;, &#039;video&#039;, &#039;object&#039;, &#039;embed&#039;, and &#039;iframe&#039;.
	 */
	$allowed_media_types = apply_filters( &#039;media_embedded_in_content_allowed_types&#039;, array( &#039;audio&#039;, &#039;video&#039;, &#039;object&#039;, &#039;embed&#039;, &#039;iframe&#039; ) );

	if ( ! empty( $types ) ) {
		if ( ! is_array( $types ) ) {
			$types = array( $types );
		}

		$allowed_media_types = array_intersect( $allowed_media_types, $types );
	}

	$tags = implode( &#039;|&#039;, $allowed_media_types );

	if ( preg_match_all( &#039;#&lt;(?P&lt;tag&gt;&#039; . $tags . &#039;)[^&lt;]*?(?:&gt;[\s\S]*?&lt;\/(?P=tag)&gt;|\s*\/&gt;)#&#039;, $content, $matches ) ) {
		foreach ( $matches[0] as $match ) {
			$html[] = $match;
		}
	}

	return $html;
}

/**
 * Retrieves galleries from the passed post&#039;s content.
 *
 * @since 3.6.0
 *
 * @param int|WP_Post $post Post ID or object.
 * @param bool        $html Optional. Whether to return HTML or data in the array. Default true.
 * @return array A list of arrays, each containing gallery data and srcs parsed
 *               from the expanded shortcode.
 */
function get_post_galleries( $post, $html = true ) {
	$post = get_post( $post );

	if ( ! $post ) {
		return array();
	}

	if ( ! has_shortcode( $post-&gt;post_content, &#039;gallery&#039; ) &amp;&amp; ! has_block( &#039;gallery&#039;, $post-&gt;post_content ) ) {
		return array();
	}

	$galleries = array();
	if ( preg_match_all( &#039;/&#039; . get_shortcode_regex() . &#039;/s&#039;, $post-&gt;post_content, $matches, PREG_SET_ORDER ) ) {
		foreach ( $matches as $shortcode ) {
			if ( &#039;gallery&#039; === $shortcode[2] ) {
				$srcs = array();

				$shortcode_attrs = shortcode_parse_atts( $shortcode[3] );
				if ( ! is_array( $shortcode_attrs ) ) {
					$shortcode_attrs = array();
				}

				// Specify the post ID of the gallery we&#039;re viewing if the shortcode doesn&#039;t reference another post already.
				if ( ! isset( $shortcode_attrs[&#039;id&#039;] ) ) {
					$shortcode[3] .= &#039; id=&quot;&#039; . (int) $post-&gt;ID . &#039;&quot;&#039;;
				}

				$gallery = do_shortcode_tag( $shortcode );
				if ( $html ) {
					$galleries[] = $gallery;
				} else {
					preg_match_all( &#039;#src=([\&#039;&quot;])(.+?)\1#is&#039;, $gallery, $src, PREG_SET_ORDER );
					if ( ! empty( $src ) ) {
						foreach ( $src as $s ) {
							$srcs[] = $s[2];
						}
					}

					$galleries[] = array_merge(
						$shortcode_attrs,
						array(
							&#039;src&#039; =&gt; array_values( array_unique( $srcs ) ),
						)
					);
				}
			}
		}
	}

	if ( has_block( &#039;gallery&#039;, $post-&gt;post_content ) ) {
		$post_blocks = parse_blocks( $post-&gt;post_content );

		while ( $block = array_shift( $post_blocks ) ) {
			$has_inner_blocks = ! empty( $block[&#039;innerBlocks&#039;] );

			// Skip blocks with no blockName and no innerHTML.
			if ( ! $block[&#039;blockName&#039;] ) {
				continue;
			}

			// Skip non-Gallery blocks.
			if ( &#039;core/gallery&#039; !== $block[&#039;blockName&#039;] ) {
				// Move inner blocks into the root array before skipping.
				if ( $has_inner_blocks ) {
					array_push( $post_blocks, ...$block[&#039;innerBlocks&#039;] );
				}
				continue;
			}

			// New Gallery block format as HTML.
			if ( $has_inner_blocks &amp;&amp; $html ) {
				$block_html  = wp_list_pluck( $block[&#039;innerBlocks&#039;], &#039;innerHTML&#039; );
				$galleries[] = &#039;&lt;figure&gt;&#039; . implode( &#039; &#039;, $block_html ) . &#039;&lt;/figure&gt;&#039;;
				continue;
			}

			$srcs = array();

			// New Gallery block format as an array.
			if ( $has_inner_blocks ) {
				$attrs = wp_list_pluck( $block[&#039;innerBlocks&#039;], &#039;attrs&#039; );
				$ids   = wp_list_pluck( $attrs, &#039;id&#039; );

				foreach ( $ids as $id ) {
					$url = wp_get_attachment_url( $id );

					if ( is_string( $url ) &amp;&amp; ! in_array( $url, $srcs, true ) ) {
						$srcs[] = $url;
					}
				}

				$galleries[] = array(
					&#039;ids&#039; =&gt; implode( &#039;,&#039;, $ids ),
					&#039;src&#039; =&gt; $srcs,
				);

				continue;
			}

			// Old Gallery block format as HTML.
			if ( $html ) {
				$galleries[] = $block[&#039;innerHTML&#039;];
				continue;
			}

			// Old Gallery block format as an array.
			$ids = ! empty( $block[&#039;attrs&#039;][&#039;ids&#039;] ) ? $block[&#039;attrs&#039;][&#039;ids&#039;] : array();

			// If present, use the image IDs from the JSON blob as canonical.
			if ( ! empty( $ids ) ) {
				foreach ( $ids as $id ) {
					$url = wp_get_attachment_url( $id );

					if ( is_string( $url ) &amp;&amp; ! in_array( $url, $srcs, true ) ) {
						$srcs[] = $url;
					}
				}

				$galleries[] = array(
					&#039;ids&#039; =&gt; implode( &#039;,&#039;, $ids ),
					&#039;src&#039; =&gt; $srcs,
				);

				continue;
			}

			// Otherwise, extract srcs from the innerHTML.
			preg_match_all( &#039;#src=([\&#039;&quot;])(.+?)\1#is&#039;, $block[&#039;innerHTML&#039;], $found_srcs, PREG_SET_ORDER );

			if ( ! empty( $found_srcs[0] ) ) {
				foreach ( $found_srcs as $src ) {
					if ( isset( $src[2] ) &amp;&amp; ! in_array( $src[2], $srcs, true ) ) {
						$srcs[] = $src[2];
					}
				}
			}

			$galleries[] = array( &#039;src&#039; =&gt; $srcs );
		}
	}

	/**
	 * Filters the list of all found galleries in the given post.
	 *
	 * @since 3.6.0
	 *
	 * @param array   $galleries Associative array of all found post galleries.
	 * @param WP_Post $post      Post object.
	 */
	return apply_filters( &#039;get_post_galleries&#039;, $galleries, $post );
}

/**
 * Checks a specified post&#039;s content for gallery and, if present, return the first
 *
 * @since 3.6.0
 *
 * @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global $post.
 * @param bool        $html Optional. Whether to return HTML or data. Default is true.
 * @return string|array Gallery data and srcs parsed from the expanded shortcode.
 */
function get_post_gallery( $post = 0, $html = true ) {
	$galleries = get_post_galleries( $post, $html );
	$gallery   = reset( $galleries );

	/**
	 * Filters the first-found post gallery.
	 *
	 * @since 3.6.0
	 *
	 * @param array       $gallery   The first-found post gallery.
	 * @param int|WP_Post $post      Post ID or object.
	 * @param array       $galleries Associative array of all found post galleries.
	 */
	return apply_filters( &#039;get_post_gallery&#039;, $gallery, $post, $galleries );
}

/**
 * Retrieves the image srcs from galleries from a post&#039;s content, if present.
 *
 * @since 3.6.0
 *
 * @see get_post_galleries()
 *
 * @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global `$post`.
 * @return array A list of lists, each containing image srcs parsed.
 *               from an expanded shortcode
 */
function get_post_galleries_images( $post = 0 ) {
	$galleries = get_post_galleries( $post, false );
	return wp_list_pluck( $galleries, &#039;src&#039; );
}

/**
 * Checks a post&#039;s content for galleries and return the image srcs for the first found gallery.
 *
 * @since 3.6.0
 *
 * @see get_post_gallery()
 *
 * @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global `$post`.
 * @return string[] A list of a gallery&#039;s image srcs in order.
 */
function get_post_gallery_images( $post = 0 ) {
	$gallery = get_post_gallery( $post, false );
	return empty( $gallery[&#039;src&#039;] ) ? array() : $gallery[&#039;src&#039;];
}

/**
 * Maybe attempts to generate attachment metadata, if missing.
 *
 * @since 3.9.0
 *
 * @param WP_Post $attachment Attachment object.
 */
function wp_maybe_generate_attachment_metadata( $attachment ) {
	if ( empty( $attachment ) || empty( $attachment-&gt;ID ) ) {
		return;
	}

	$attachment_id = (int) $attachment-&gt;ID;
	$file          = get_attached_file( $attachment_id );
	$meta          = wp_get_attachment_metadata( $attachment_id );

	if ( empty( $meta ) &amp;&amp; file_exists( $file ) ) {
		$_meta = get_post_meta( $attachment_id );
		$_lock = &#039;wp_generating_att_&#039; . $attachment_id;

		if ( ! array_key_exists( &#039;_wp_attachment_metadata&#039;, $_meta ) &amp;&amp; ! get_transient( $_lock ) ) {
			set_transient( $_lock, $file );
			wp_update_attachment_metadata( $attachment_id, wp_generate_attachment_metadata( $attachment_id, $file ) );
			delete_transient( $_lock );
		}
	}
}

/**
 * Tries to convert an attachment URL into a post ID.
 *
 * @since 4.0.0
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param string $url The URL to resolve.
 * @return int The found post ID, or 0 on failure.
 */
function attachment_url_to_postid( $url ) {
	global $wpdb;

	$dir  = wp_get_upload_dir();
	$path = $url;

	$site_url   = parse_url( $dir[&#039;url&#039;] );
	$image_path = parse_url( $path );

	// Force the protocols to match if needed.
	if ( isset( $image_path[&#039;scheme&#039;] ) &amp;&amp; ( $image_path[&#039;scheme&#039;] !== $site_url[&#039;scheme&#039;] ) ) {
		$path = str_replace( $image_path[&#039;scheme&#039;], $site_url[&#039;scheme&#039;], $path );
	}

	if ( str_starts_with( $path, $dir[&#039;baseurl&#039;] . &#039;/&#039; ) ) {
		$path = substr( $path, strlen( $dir[&#039;baseurl&#039;] . &#039;/&#039; ) );
	}

	$sql = $wpdb-&gt;prepare(
		&quot;SELECT post_id, meta_value FROM $wpdb-&gt;postmeta WHERE meta_key = &#039;_wp_attached_file&#039; AND meta_value = %s&quot;,
		$path
	);

	$results = $wpdb-&gt;get_results( $sql );
	$post_id = null;

	if ( $results ) {
		// Use the first available result, but prefer a case-sensitive match, if exists.
		$post_id = reset( $results )-&gt;post_id;

		if ( count( $results ) &gt; 1 ) {
			foreach ( $results as $result ) {
				if ( $path === $result-&gt;meta_value ) {
					$post_id = $result-&gt;post_id;
					break;
				}
			}
		}
	}

	/**
	 * Filters an attachment ID found by URL.
	 *
	 * @since 4.2.0
	 *
	 * @param int|null $post_id The post_id (if any) found by the function.
	 * @param string   $url     The URL being looked up.
	 */
	return (int) apply_filters( &#039;attachment_url_to_postid&#039;, $post_id, $url );
}

/**
 * Returns the URLs for CSS files used in an iframe-sandbox&#039;d TinyMCE media view.
 *
 * @since 4.0.0
 *
 * @return string[] The relevant CSS file URLs.
 */
function wpview_media_sandbox_styles() {
	$version        = &#039;ver=&#039; . get_bloginfo( &#039;version&#039; );
	$mediaelement   = includes_url( &quot;js/mediaelement/mediaelementplayer-legacy.min.css?$version&quot; );
	$wpmediaelement = includes_url( &quot;js/mediaelement/wp-mediaelement.css?$version&quot; );

	return array( $mediaelement, $wpmediaelement );
}

/**
 * Registers the personal data exporter for media.
 *
 * @param array[] $exporters An array of personal data exporters, keyed by their ID.
 * @return array[] Updated array of personal data exporters.
 */
function wp_register_media_personal_data_exporter( $exporters ) {
	$exporters[&#039;wordpress-media&#039;] = array(
		&#039;exporter_friendly_name&#039; =&gt; __( &#039;WordPress Media&#039; ),
		&#039;callback&#039;               =&gt; &#039;wp_media_personal_data_exporter&#039;,
	);

	return $exporters;
}

/**
 * Finds and exports attachments associated with an email address.
 *
 * @since 4.9.6
 *
 * @param string $email_address The attachment owner email address.
 * @param int    $page          Attachment page.
 * @return array An array of personal data.
 */
function wp_media_personal_data_exporter( $email_address, $page = 1 ) {
	// Limit us to 50 attachments at a time to avoid timing out.
	$number = 50;
	$page   = (int) $page;

	$data_to_export = array();

	$user = get_user_by( &#039;email&#039;, $email_address );
	if ( false === $user ) {
		return array(
			&#039;data&#039; =&gt; $data_to_export,
			&#039;done&#039; =&gt; true,
		);
	}

	$post_query = new WP_Query(
		array(
			&#039;author&#039;         =&gt; $user-&gt;ID,
			&#039;posts_per_page&#039; =&gt; $number,
			&#039;paged&#039;          =&gt; $page,
			&#039;post_type&#039;      =&gt; &#039;attachment&#039;,
			&#039;post_status&#039;    =&gt; &#039;any&#039;,
			&#039;orderby&#039;        =&gt; &#039;ID&#039;,
			&#039;order&#039;          =&gt; &#039;ASC&#039;,
		)
	);

	foreach ( (array) $post_query-&gt;posts as $post ) {
		$attachment_url = wp_get_attachment_url( $post-&gt;ID );

		if ( $attachment_url ) {
			$post_data_to_export = array(
				array(
					&#039;name&#039;  =&gt; __( &#039;URL&#039; ),
					&#039;value&#039; =&gt; $attachment_url,
				),
			);

			$data_to_export[] = array(
				&#039;group_id&#039;          =&gt; &#039;media&#039;,
				&#039;group_label&#039;       =&gt; __( &#039;Media&#039; ),
				&#039;group_description&#039; =&gt; __( &#039;User&amp;#8217;s media data.&#039; ),
				&#039;item_id&#039;           =&gt; &quot;post-{$post-&gt;ID}&quot;,
				&#039;data&#039;              =&gt; $post_data_to_export,
			);
		}
	}

	$done = $post_query-&gt;max_num_pages &lt;= $page;

	return array(
		&#039;data&#039; =&gt; $data_to_export,
		&#039;done&#039; =&gt; $done,
	);
}

/**
 * Adds additional default image sub-sizes.
 *
 * These sizes are meant to enhance the way WordPress displays images on the front-end on larger,
 * high-density devices. They make it possible to generate more suitable `srcset` and `sizes` attributes
 * when the users upload large images.
 *
 * The sizes can be changed or removed by themes and plugins but that is not recommended.
 * The size &quot;names&quot; reflect the image dimensions, so changing the sizes would be quite misleading.
 *
 * @since 5.3.0
 * @access private
 */
function _wp_add_additional_image_sizes() {
	// 2x medium_large size.
	add_image_size( &#039;1536x1536&#039;, 1536, 1536 );
	// 2x large size.
	add_image_size( &#039;2048x2048&#039;, 2048, 2048 );
}

/**
 * Callback to enable showing of the user error when uploading .heic images.
 *
 * @since 5.5.0
 *
 * @param array[] $plupload_settings The settings for Plupload.js.
 * @return array[] Modified settings for Plupload.js.
 */
function wp_show_heic_upload_error( $plupload_settings ) {
	$plupload_settings[&#039;heic_upload_error&#039;] = true;
	return $plupload_settings;
}

/**
 * Allows PHP&#039;s getimagesize() to be debuggable when necessary.
 *
 * @since 5.7.0
 * @since 5.8.0 Added support for WebP images.
 *
 * @param string $filename   The file path.
 * @param array  $image_info Optional. Extended image information (passed by reference).
 * @return array|false Array of image information or false on failure.
 */
function wp_getimagesize( $filename, array &amp;$image_info = null ) {
	// Don&#039;t silence errors when in debug mode, unless running unit tests.
	if ( defined( &#039;WP_DEBUG&#039; ) &amp;&amp; WP_DEBUG
		&amp;&amp; ! defined( &#039;WP_RUN_CORE_TESTS&#039; )
	) {
		if ( 2 === func_num_args() ) {
			$info = getimagesize( $filename, $image_info );
		} else {
			$info = getimagesize( $filename );
		}
	} else {
		/*
		 * Silencing notice and warning is intentional.
		 *
		 * getimagesize() has a tendency to generate errors, such as
		 * &quot;corrupt JPEG data: 7191 extraneous bytes before marker&quot;,
		 * even when it&#039;s able to provide image size information.
		 *
		 * See https://core.trac.wordpress.org/ticket/42480
		 */
		if ( 2 === func_num_args() ) {
			// phpcs:ignore WordPress.PHP.NoSilencedErrors
			$info = @getimagesize( $filename, $image_info );
		} else {
			// phpcs:ignore WordPress.PHP.NoSilencedErrors
			$info = @getimagesize( $filename );
		}
	}

	if ( false !== $info ) {
		return $info;
	}

	/*
	 * For PHP versions that don&#039;t support WebP images,
	 * extract the image size info from the file headers.
	 */
	if ( &#039;image/webp&#039; === wp_get_image_mime( $filename ) ) {
		$webp_info = wp_get_webp_info( $filename );
		$width     = $webp_info[&#039;width&#039;];
		$height    = $webp_info[&#039;height&#039;];

		// Mimic the native return format.
		if ( $width &amp;&amp; $height ) {
			return array(
				$width,
				$height,
				IMAGETYPE_WEBP,
				sprintf(
					&#039;width=&quot;%d&quot; height=&quot;%d&quot;&#039;,
					$width,
					$height
				),
				&#039;mime&#039; =&gt; &#039;image/webp&#039;,
			);
		}
	}

	// The image could not be parsed.
	return false;
}

/**
 * Extracts meta information about a WebP file: width, height, and type.
 *
 * @since 5.8.0
 *
 * @param string $filename Path to a WebP file.
 * @return array {
 *     An array of WebP image information.
 *
 *     @type int|false    $width  Image width on success, false on failure.
 *     @type int|false    $height Image height on success, false on failure.
 *     @type string|false $type   The WebP type: one of &#039;lossy&#039;, &#039;lossless&#039; or &#039;animated-alpha&#039;.
 *                                False on failure.
 * }
 */
function wp_get_webp_info( $filename ) {
	$width  = false;
	$height = false;
	$type   = false;

	if ( &#039;image/webp&#039; !== wp_get_image_mime( $filename ) ) {
		return compact( &#039;width&#039;, &#039;height&#039;, &#039;type&#039; );
	}

	$magic = file_get_contents( $filename, false, null, 0, 40 );

	if ( false === $magic ) {
		return compact( &#039;width&#039;, &#039;height&#039;, &#039;type&#039; );
	}

	// Make sure we got enough bytes.
	if ( strlen( $magic ) &lt; 40 ) {
		return compact( &#039;width&#039;, &#039;height&#039;, &#039;type&#039; );
	}

	/*
	 * The headers are a little different for each of the three formats.
	 * Header values based on WebP docs, see https://developers.google.com/speed/webp/docs/riff_container.
	 */
	switch ( substr( $magic, 12, 4 ) ) {
		// Lossy WebP.
		case &#039;VP8 &#039;:
			$parts  = unpack( &#039;v2&#039;, substr( $magic, 26, 4 ) );
			$width  = (int) ( $parts[1] &amp; 0x3FFF );
			$height = (int) ( $parts[2] &amp; 0x3FFF );
			$type   = &#039;lossy&#039;;
			break;
		// Lossless WebP.
		case &#039;VP8L&#039;:
			$parts  = unpack( &#039;C4&#039;, substr( $magic, 21, 4 ) );
			$width  = (int) ( $parts[1] | ( ( $parts[2] &amp; 0x3F ) &lt;&lt; 8 ) ) + 1;
			$height = (int) ( ( ( $parts[2] &amp; 0xC0 ) &gt;&gt; 6 ) | ( $parts[3] &lt;&lt; 2 ) | ( ( $parts[4] &amp; 0x03 ) &lt;&lt; 10 ) ) + 1;
			$type   = &#039;lossless&#039;;
			break;
		// Animated/alpha WebP.
		case &#039;VP8X&#039;:
			// Pad 24-bit int.
			$width = unpack( &#039;V&#039;, substr( $magic, 24, 3 ) . &quot;\x00&quot; );
			$width = (int) ( $width[1] &amp; 0xFFFFFF ) + 1;
			// Pad 24-bit int.
			$height = unpack( &#039;V&#039;, substr( $magic, 27, 3 ) . &quot;\x00&quot; );
			$height = (int) ( $height[1] &amp; 0xFFFFFF ) + 1;
			$type   = &#039;animated-alpha&#039;;
			break;
	}

	return compact( &#039;width&#039;, &#039;height&#039;, &#039;type&#039; );
}

/**
 * Gets loading optimization attributes.
 *
 * This function returns an array of attributes that should be merged into the given attributes array to optimize
 * loading performance. Potential attributes returned by this function are:
 * - `loading` attribute with a value of &quot;lazy&quot;
 * - `fetchpriority` attribute with a value of &quot;high&quot;
 *
 * If any of these attributes are already present in the given attributes, they will not be modified. Note that no
 * element should have both `loading=&quot;lazy&quot;` and `fetchpriority=&quot;high&quot;`, so the function will trigger a warning in case
 * both attributes are present with those values.
 *
 * @since 6.3.0
 *
 * @global WP_Query $wp_query WordPress Query object.
 *
 * @param string $tag_name The tag name.
 * @param array  $attr     Array of the attributes for the tag.
 * @param string $context  Context for the element for which the loading optimization attribute is requested.
 * @return array Loading optimization attributes.
 */
function wp_get_loading_optimization_attributes( $tag_name, $attr, $context ) {
	global $wp_query;

	/*
	 * Closure for postprocessing logic.
	 * It is here to avoid duplicate logic in many places below, without having
	 * to introduce a very specific private global function.
	 */
	$postprocess = static function( $loading_attributes, $with_fetchpriority = false ) use ( $tag_name, $attr, $context ) {
		// Potentially add `fetchpriority=&quot;high&quot;`.
		if ( $with_fetchpriority ) {
			$loading_attributes = wp_maybe_add_fetchpriority_high_attr( $loading_attributes, $tag_name, $attr );
		}
		// Potentially strip `loading=&quot;lazy&quot;` if the feature is disabled.
		if ( isset( $loading_attributes[&#039;loading&#039;] ) &amp;&amp; ! wp_lazy_loading_enabled( $tag_name, $context ) ) {
			unset( $loading_attributes[&#039;loading&#039;] );
		}
		return $loading_attributes;
	};
	// Closure to increase media count for images with certain minimum threshold, mostly used for header images.
	$maybe_increase_content_media_count = static function() use ( $attr ) {
		/** This filter is documented in wp-admin/includes/media.php */
		$wp_min_priority_img_pixels = apply_filters( &#039;wp_min_priority_img_pixels&#039;, 50000 );
		// Images with a certain minimum size in the header of the page are also counted towards the threshold.
		if ( $wp_min_priority_img_pixels &lt;= $attr[&#039;width&#039;] * $attr[&#039;height&#039;] ) {
			wp_increase_content_media_count();
		}
	};

	$loading_attrs = array();

	/*
	 * Skip lazy-loading for the overall block template, as it is handled more granularly.
	 * The skip is also applicable for `fetchpriority`.
	 */
	if ( &#039;template&#039; === $context ) {
		return $loading_attrs;
	}

	// For now this function only supports images and iframes.
	if ( &#039;img&#039; !== $tag_name &amp;&amp; &#039;iframe&#039; !== $tag_name ) {
		return $loading_attrs;
	}

	// For any resources, width and height must be provided, to avoid layout shifts.
	if ( ! isset( $attr[&#039;width&#039;], $attr[&#039;height&#039;] ) ) {
		return $loading_attrs;
	}

	if ( isset( $attr[&#039;loading&#039;] ) ) {
		/*
		 * While any `loading` value could be set in `$loading_attrs`, for
		 * consistency we only do it for `loading=&quot;lazy&quot;` since that is the
		 * only possible value that WordPress core would apply on its own.
		 */
		if ( &#039;lazy&#039; === $attr[&#039;loading&#039;] ) {
			$loading_attrs[&#039;loading&#039;] = &#039;lazy&#039;;
			if ( isset( $attr[&#039;fetchpriority&#039;] ) &amp;&amp; &#039;high&#039; === $attr[&#039;fetchpriority&#039;] ) {
				_doing_it_wrong(
					__FUNCTION__,
					__( &#039;An image should not be lazy-loaded and marked as high priority at the same time.&#039; ),
					&#039;6.3.0&#039;
				);
			}
		}

		return $postprocess( $loading_attrs, true );
	}

	// An image with `fetchpriority=&quot;high&quot;` cannot be assigned `loading=&quot;lazy&quot;` at the same time.
	if ( isset( $attr[&#039;fetchpriority&#039;] ) &amp;&amp; &#039;high&#039; === $attr[&#039;fetchpriority&#039;] ) {
		return $postprocess( $loading_attrs, true );
	}

	/*
	 * Do not lazy-load images in the header block template part, as they are likely above the fold.
	 * For classic themes, this is handled in the condition below using the &#039;get_header&#039; action.
	 */
	$header_area = WP_TEMPLATE_PART_AREA_HEADER;
	if ( &quot;template_part_{$header_area}&quot; === $context ) {
		// Increase media count if there are images in header above a certian minimum size threshold.
		$maybe_increase_content_media_count();
		return $postprocess( $loading_attrs, true );
	}

	// The custom header image is always expected to be in the header.
	if ( &#039;get_header_image_tag&#039; === $context ) {
		// Increase media count if there are images in header above a certian minimum size threshold.
		$maybe_increase_content_media_count();
		return $postprocess( $loading_attrs, true );
	}

	// Special handling for programmatically created image tags.
	if ( &#039;the_post_thumbnail&#039; === $context || &#039;wp_get_attachment_image&#039; === $context || &#039;widget_media_image&#039; === $context ) {
		/*
		 * Skip programmatically created images within post content as they need to be handled together with the other
		 * images within the post content.
		 * Without this clause, they would already be considered below which skews the image count and can result in
		 * the first post content image being lazy-loaded or an image further down the page being marked as a high
		 * priority.
		 */
		if ( doing_filter( &#039;the_content&#039; ) ) {
			return $loading_attrs;
		}

		// Conditionally skip lazy-loading on images before the loop.
		if (
			// Only apply for main query but before the loop.
			$wp_query-&gt;before_loop &amp;&amp; $wp_query-&gt;is_main_query()
			/*
			 * Any image before the loop, but after the header has started should not be lazy-loaded,
			 * except when the footer has already started which can happen when the current template
			 * does not include any loop.
			 */
			&amp;&amp; did_action( &#039;get_header&#039; ) &amp;&amp; ! did_action( &#039;get_footer&#039; )
		) {
			// Increase media count if there are images in header above a certian minimum size threshold.
			$maybe_increase_content_media_count();
			return $postprocess( $loading_attrs, true );
		}
	}

	/*
	 * The first elements in &#039;the_content&#039; or &#039;the_post_thumbnail&#039; should not be lazy-loaded,
	 * as they are likely above the fold. Shortcodes are processed after content images, so if
	 * thresholds haven&#039;t already been met, apply the same logic to those as well.
	 */
	if ( &#039;the_content&#039; === $context || &#039;the_post_thumbnail&#039; === $context || &#039;do_shortcode&#039; === $context ) {
		// Only elements within the main query loop have special handling.
		if ( is_admin() || ! in_the_loop() || ! is_main_query() ) {
			$loading_attrs[&#039;loading&#039;] = &#039;lazy&#039;;
			return $postprocess( $loading_attrs, false );
		}

		// Increase the counter since this is a main query content element.
		$content_media_count = wp_increase_content_media_count();

		// If the count so far is below the threshold, `loading` attribute is omitted.
		if ( $content_media_count &lt;= wp_omit_loading_attr_threshold() ) {
			// The first largest image will still get `fetchpriority=&#039;high&#039;`.
			return $postprocess( $loading_attrs, true );
		}
	}

	// Lazy-load by default for any unknown context.
	$loading_attrs[&#039;loading&#039;] = &#039;lazy&#039;;
	return $postprocess( $loading_attrs, false );
}

/**
 * Gets the threshold for how many of the first content media elements to not lazy-load.
 *
 * This function runs the {@see &#039;wp_omit_loading_attr_threshold&#039;} filter, which uses a default threshold value of 3.
 * The filter is only run once per page load, unless the `$force` parameter is used.
 *
 * @since 5.9.0
 *
 * @param bool $force Optional. If set to true, the filter will be (re-)applied even if it already has been before.
 *                    Default false.
 * @return int The number of content media elements to not lazy-load.
 */
function wp_omit_loading_attr_threshold( $force = false ) {
	static $omit_threshold;

	// This function may be called multiple times. Run the filter only once per page load.
	if ( ! isset( $omit_threshold ) || $force ) {
		/**
		 * Filters the threshold for how many of the first content media elements to not lazy-load.
		 *
		 * For these first content media elements, the `loading` attribute will be omitted. By default, this is the case
		 * for only the very first content media element.
		 *
		 * @since 5.9.0
		 * @since 6.3.0 The default threshold was changed from 1 to 3.
		 *
		 * @param int $omit_threshold The number of media elements where the `loading` attribute will not be added. Default 3.
		 */
		$omit_threshold = apply_filters( &#039;wp_omit_loading_attr_threshold&#039;, 3 );
	}

	return $omit_threshold;
}

/**
 * Increases an internal content media count variable.
 *
 * @since 5.9.0
 * @access private
 *
 * @param int $amount Optional. Amount to increase by. Default 1.
 * @return int The latest content media count, after the increase.
 */
function wp_increase_content_media_count( $amount = 1 ) {
	static $content_media_count = 0;

	$content_media_count += $amount;

	return $content_media_count;
}

/**
 * Determines whether to add `fetchpriority=&#039;high&#039;` to loading attributes.
 *
 * @since 6.3.0
 * @access private
 *
 * @param array  $loading_attrs Array of the loading optimization attributes for the element.
 * @param string $tag_name      The tag name.
 * @param array  $attr          Array of the attributes for the element.
 * @return array Updated loading optimization attributes for the element.
 */
function wp_maybe_add_fetchpriority_high_attr( $loading_attrs, $tag_name, $attr ) {
	// For now, adding `fetchpriority=&quot;high&quot;` is only supported for images.
	if ( &#039;img&#039; !== $tag_name ) {
		return $loading_attrs;
	}

	if ( isset( $attr[&#039;fetchpriority&#039;] ) ) {
		/*
		 * While any `fetchpriority` value could be set in `$loading_attrs`,
		 * for consistency we only do it for `fetchpriority=&quot;high&quot;` since that
		 * is the only possible value that WordPress core would apply on its
		 * own.
		 */
		if ( &#039;high&#039; === $attr[&#039;fetchpriority&#039;] ) {
			$loading_attrs[&#039;fetchpriority&#039;] = &#039;high&#039;;
			wp_high_priority_element_flag( false );
		}
		return $loading_attrs;
	}

	// Lazy-loading and `fetchpriority=&quot;high&quot;` are mutually exclusive.
	if ( isset( $loading_attrs[&#039;loading&#039;] ) &amp;&amp; &#039;lazy&#039; === $loading_attrs[&#039;loading&#039;] ) {
		return $loading_attrs;
	}

	if ( ! wp_high_priority_element_flag() ) {
		return $loading_attrs;
	}

	/**
	 * Filters the minimum square-pixels threshold for an image to be eligible as the high-priority image.
	 *
	 * @since 6.3.0
	 *
	 * @param int $threshold Minimum square-pixels threshold. Default 50000.
	 */
	$wp_min_priority_img_pixels = apply_filters( &#039;wp_min_priority_img_pixels&#039;, 50000 );
	if ( $wp_min_priority_img_pixels &lt;= $attr[&#039;width&#039;] * $attr[&#039;height&#039;] ) {
		$loading_attrs[&#039;fetchpriority&#039;] = &#039;high&#039;;
		wp_high_priority_element_flag( false );
	}
	return $loading_attrs;
}

/**
 * Accesses a flag that indicates if an element is a possible candidate for `fetchpriority=&#039;high&#039;`.
 *
 * @since 6.3.0
 * @access private
 *
 * @param bool $value Optional. Used to change the static variable. Default null.
 * @return bool Returns true if high-priority element was marked already, otherwise false.
 */
function wp_high_priority_element_flag( $value = null ) {
	static $high_priority_element = true;

	if ( is_bool( $value ) ) {
		$high_priority_element = $value;
	}
	return $high_priority_element;
}
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