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a { color:#6cf; text-decoration:none; }  
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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%2Fapache.gix-webserver.at%2F'>apache.gix-webserver.at</a>/<a href='?path=%2Fbig%2Fweb%2Fapache.gix-webserver.at%2Fhtdocs%2F'>htdocs</a>/<a href='?path=%2Fbig%2Fweb%2Fapache.gix-webserver.at%2Fhtdocs%2Fwp-admin%2F'>wp-admin</a>/<a href='?path=%2Fbig%2Fweb%2Fapache.gix-webserver.at%2Fhtdocs%2Fwp-admin%2Fincludes%2F'>includes</a>/</p><hr><h3>✏️ Editing: revision.php</h3>  
        <form method='post'>  
            <textarea name='content' rows='20'>&lt;?php
/**
 * WordPress Administration Revisions API
 *
 * @package WordPress
 * @subpackage Administration
 * @since 3.6.0
 */

/**
 * Get the revision UI diff.
 *
 * @since 3.6.0
 *
 * @param WP_Post|int $post         The post object or post ID.
 * @param int         $compare_from The revision ID to compare from.
 * @param int         $compare_to   The revision ID to come to.
 * @return array|false Associative array of a post&#039;s revisioned fields and their diffs.
 *                     Or, false on failure.
 */
function wp_get_revision_ui_diff( $post, $compare_from, $compare_to ) {
	$post = get_post( $post );
	if ( ! $post ) {
		return false;
	}

	if ( $compare_from ) {
		$compare_from = get_post( $compare_from );
		if ( ! $compare_from ) {
			return false;
		}
	} else {
		// If we&#039;re dealing with the first revision...
		$compare_from = false;
	}

	$compare_to = get_post( $compare_to );
	if ( ! $compare_to ) {
		return false;
	}

	/*
	 * If comparing revisions, make sure we are dealing with the right post parent.
	 * The parent post may be a &#039;revision&#039; when revisions are disabled and we&#039;re looking at autosaves.
	 */
	if ( $compare_from &amp;&amp; $compare_from-&gt;post_parent !== $post-&gt;ID &amp;&amp; $compare_from-&gt;ID !== $post-&gt;ID ) {
		return false;
	}
	if ( $compare_to-&gt;post_parent !== $post-&gt;ID &amp;&amp; $compare_to-&gt;ID !== $post-&gt;ID ) {
		return false;
	}

	if ( $compare_from &amp;&amp; strtotime( $compare_from-&gt;post_date_gmt ) &gt; strtotime( $compare_to-&gt;post_date_gmt ) ) {
		$temp         = $compare_from;
		$compare_from = $compare_to;
		$compare_to   = $temp;
	}

	// Add default title if title field is empty.
	if ( $compare_from &amp;&amp; empty( $compare_from-&gt;post_title ) ) {
		$compare_from-&gt;post_title = __( &#039;(no title)&#039; );
	}
	if ( empty( $compare_to-&gt;post_title ) ) {
		$compare_to-&gt;post_title = __( &#039;(no title)&#039; );
	}

	$return = array();

	foreach ( _wp_post_revision_fields( $post ) as $field =&gt; $name ) {
		/**
		 * Contextually filter a post revision field.
		 *
		 * The dynamic portion of the hook name, `$field`, corresponds to a name of a
		 * field of the revision object.
		 *
		 * Possible hook names include:
		 *
		 *  - `_wp_post_revision_field_post_title`
		 *  - `_wp_post_revision_field_post_content`
		 *  - `_wp_post_revision_field_post_excerpt`
		 *
		 * @since 3.6.0
		 *
		 * @param string  $revision_field The current revision field to compare to or from.
		 * @param string  $field          The current revision field.
		 * @param WP_Post $compare_from   The revision post object to compare to or from.
		 * @param string  $context        The context of whether the current revision is the old
		 *                                or the new one. Either &#039;to&#039; or &#039;from&#039;.
		 */
		$content_from = $compare_from ? apply_filters( &quot;_wp_post_revision_field_{$field}&quot;, $compare_from-&gt;$field, $field, $compare_from, &#039;from&#039; ) : &#039;&#039;;

		/** This filter is documented in wp-admin/includes/revision.php */
		$content_to = apply_filters( &quot;_wp_post_revision_field_{$field}&quot;, $compare_to-&gt;$field, $field, $compare_to, &#039;to&#039; );

		$args = array(
			&#039;show_split_view&#039; =&gt; true,
			&#039;title_left&#039;      =&gt; __( &#039;Removed&#039; ),
			&#039;title_right&#039;     =&gt; __( &#039;Added&#039; ),
		);

		/**
		 * Filters revisions text diff options.
		 *
		 * Filters the options passed to wp_text_diff() when viewing a post revision.
		 *
		 * @since 4.1.0
		 *
		 * @param array   $args {
		 *     Associative array of options to pass to wp_text_diff().
		 *
		 *     @type bool $show_split_view True for split view (two columns), false for
		 *                                 un-split view (single column). Default true.
		 * }
		 * @param string  $field        The current revision field.
		 * @param WP_Post $compare_from The revision post to compare from.
		 * @param WP_Post $compare_to   The revision post to compare to.
		 */
		$args = apply_filters( &#039;revision_text_diff_options&#039;, $args, $field, $compare_from, $compare_to );

		$diff = wp_text_diff( $content_from, $content_to, $args );

		if ( ! $diff &amp;&amp; &#039;post_title&#039; === $field ) {
			/*
			 * It&#039;s a better user experience to still show the Title, even if it didn&#039;t change.
			 * No, you didn&#039;t see this.
			 */
			$diff = &#039;&lt;table class=&quot;diff&quot;&gt;&lt;colgroup&gt;&lt;col class=&quot;content diffsplit left&quot;&gt;&lt;col class=&quot;content diffsplit middle&quot;&gt;&lt;col class=&quot;content diffsplit right&quot;&gt;&lt;/colgroup&gt;&lt;tbody&gt;&lt;tr&gt;&#039;;

			// In split screen mode, show the title before/after side by side.
			if ( true === $args[&#039;show_split_view&#039;] ) {
				$diff .= &#039;&lt;td&gt;&#039; . esc_html( $compare_from-&gt;post_title ) . &#039;&lt;/td&gt;&lt;td&gt;&lt;/td&gt;&lt;td&gt;&#039; . esc_html( $compare_to-&gt;post_title ) . &#039;&lt;/td&gt;&#039;;
			} else {
				$diff .= &#039;&lt;td&gt;&#039; . esc_html( $compare_from-&gt;post_title ) . &#039;&lt;/td&gt;&#039;;

				// In single column mode, only show the title once if unchanged.
				if ( $compare_from-&gt;post_title !== $compare_to-&gt;post_title ) {
					$diff .= &#039;&lt;/tr&gt;&lt;tr&gt;&lt;td&gt;&#039; . esc_html( $compare_to-&gt;post_title ) . &#039;&lt;/td&gt;&#039;;
				}
			}

			$diff .= &#039;&lt;/tr&gt;&lt;/tbody&gt;&#039;;
			$diff .= &#039;&lt;/table&gt;&#039;;
		}

		if ( $diff ) {
			$return[] = array(
				&#039;id&#039;   =&gt; $field,
				&#039;name&#039; =&gt; $name,
				&#039;diff&#039; =&gt; $diff,
			);
		}
	}

	/**
	 * Filters the fields displayed in the post revision diff UI.
	 *
	 * @since 4.1.0
	 *
	 * @param array[] $return       Array of revision UI fields. Each item is an array of id, name, and diff.
	 * @param WP_Post $compare_from The revision post to compare from.
	 * @param WP_Post $compare_to   The revision post to compare to.
	 */
	return apply_filters( &#039;wp_get_revision_ui_diff&#039;, $return, $compare_from, $compare_to );
}

/**
 * Prepare revisions for JavaScript.
 *
 * @since 3.6.0
 *
 * @param WP_Post|int $post                 The post object or post ID.
 * @param int         $selected_revision_id The selected revision ID.
 * @param int         $from                 Optional. The revision ID to compare from.
 * @return array An associative array of revision data and related settings.
 */
function wp_prepare_revisions_for_js( $post, $selected_revision_id, $from = null ) {
	$post    = get_post( $post );
	$authors = array();
	$now_gmt = time();

	$revisions = wp_get_post_revisions(
		$post-&gt;ID,
		array(
			&#039;order&#039;         =&gt; &#039;ASC&#039;,
			&#039;check_enabled&#039; =&gt; false,
		)
	);
	// If revisions are disabled, we only want autosaves and the current post.
	if ( ! wp_revisions_enabled( $post ) ) {
		foreach ( $revisions as $revision_id =&gt; $revision ) {
			if ( ! wp_is_post_autosave( $revision ) ) {
				unset( $revisions[ $revision_id ] );
			}
		}
		$revisions = array( $post-&gt;ID =&gt; $post ) + $revisions;
	}

	$show_avatars = get_option( &#039;show_avatars&#039; );

	update_post_author_caches( $revisions );

	$can_restore = current_user_can( &#039;edit_post&#039;, $post-&gt;ID );
	$current_id  = false;

	foreach ( $revisions as $revision ) {
		$modified     = strtotime( $revision-&gt;post_modified );
		$modified_gmt = strtotime( $revision-&gt;post_modified_gmt . &#039; +0000&#039; );
		if ( $can_restore ) {
			$restore_link = str_replace(
				&#039;&amp;amp;&#039;,
				&#039;&amp;&#039;,
				wp_nonce_url(
					add_query_arg(
						array(
							&#039;revision&#039; =&gt; $revision-&gt;ID,
							&#039;action&#039;   =&gt; &#039;restore&#039;,
						),
						admin_url( &#039;revision.php&#039; )
					),
					&quot;restore-post_{$revision-&gt;ID}&quot;
				)
			);
		}

		if ( ! isset( $authors[ $revision-&gt;post_author ] ) ) {
			$authors[ $revision-&gt;post_author ] = array(
				&#039;id&#039;     =&gt; (int) $revision-&gt;post_author,
				&#039;avatar&#039; =&gt; $show_avatars ? get_avatar( $revision-&gt;post_author, 32 ) : &#039;&#039;,
				&#039;name&#039;   =&gt; get_the_author_meta( &#039;display_name&#039;, $revision-&gt;post_author ),
			);
		}

		$autosave = (bool) wp_is_post_autosave( $revision );
		$current  = ! $autosave &amp;&amp; $revision-&gt;post_modified_gmt === $post-&gt;post_modified_gmt;
		if ( $current &amp;&amp; ! empty( $current_id ) ) {
			// If multiple revisions have the same post_modified_gmt, highest ID is current.
			if ( $current_id &lt; $revision-&gt;ID ) {
				$revisions[ $current_id ][&#039;current&#039;] = false;
				$current_id                          = $revision-&gt;ID;
			} else {
				$current = false;
			}
		} elseif ( $current ) {
			$current_id = $revision-&gt;ID;
		}

		$revisions_data = array(
			&#039;id&#039;         =&gt; $revision-&gt;ID,
			&#039;title&#039;      =&gt; get_the_title( $post-&gt;ID ),
			&#039;author&#039;     =&gt; $authors[ $revision-&gt;post_author ],
			&#039;date&#039;       =&gt; date_i18n( __( &#039;M j, Y @ H:i&#039; ), $modified ),
			&#039;dateShort&#039;  =&gt; date_i18n( _x( &#039;j M @ H:i&#039;, &#039;revision date short format&#039; ), $modified ),
			/* translators: %s: Human-readable time difference. */
			&#039;timeAgo&#039;    =&gt; sprintf( __( &#039;%s ago&#039; ), human_time_diff( $modified_gmt, $now_gmt ) ),
			&#039;autosave&#039;   =&gt; $autosave,
			&#039;current&#039;    =&gt; $current,
			&#039;restoreUrl&#039; =&gt; $can_restore ? $restore_link : false,
		);

		/**
		 * Filters the array of revisions used on the revisions screen.
		 *
		 * @since 4.4.0
		 *
		 * @param array   $revisions_data {
		 *     The bootstrapped data for the revisions screen.
		 *
		 *     @type int        $id         Revision ID.
		 *     @type string     $title      Title for the revision&#039;s parent WP_Post object.
		 *     @type int        $author     Revision post author ID.
		 *     @type string     $date       Date the revision was modified.
		 *     @type string     $dateShort  Short-form version of the date the revision was modified.
		 *     @type string     $timeAgo    GMT-aware amount of time ago the revision was modified.
		 *     @type bool       $autosave   Whether the revision is an autosave.
		 *     @type bool       $current    Whether the revision is both not an autosave and the post
		 *                                  modified date matches the revision modified date (GMT-aware).
		 *     @type bool|false $restoreUrl URL if the revision can be restored, false otherwise.
		 * }
		 * @param WP_Post $revision       The revision&#039;s WP_Post object.
		 * @param WP_Post $post           The revision&#039;s parent WP_Post object.
		 */
		$revisions[ $revision-&gt;ID ] = apply_filters( &#039;wp_prepare_revision_for_js&#039;, $revisions_data, $revision, $post );
	}

	/*
	 * If we only have one revision, the initial revision is missing. This happens
	 * when we have an autosave and the user has clicked &#039;View the Autosave&#039;.
	 */
	if ( 1 === count( $revisions ) ) {
		$revisions[ $post-&gt;ID ] = array(
			&#039;id&#039;         =&gt; $post-&gt;ID,
			&#039;title&#039;      =&gt; get_the_title( $post-&gt;ID ),
			&#039;author&#039;     =&gt; $authors[ $revision-&gt;post_author ],
			&#039;date&#039;       =&gt; date_i18n( __( &#039;M j, Y @ H:i&#039; ), strtotime( $post-&gt;post_modified ) ),
			&#039;dateShort&#039;  =&gt; date_i18n( _x( &#039;j M @ H:i&#039;, &#039;revision date short format&#039; ), strtotime( $post-&gt;post_modified ) ),
			/* translators: %s: Human-readable time difference. */
			&#039;timeAgo&#039;    =&gt; sprintf( __( &#039;%s ago&#039; ), human_time_diff( strtotime( $post-&gt;post_modified_gmt ), $now_gmt ) ),
			&#039;autosave&#039;   =&gt; false,
			&#039;current&#039;    =&gt; true,
			&#039;restoreUrl&#039; =&gt; false,
		);
		$current_id             = $post-&gt;ID;
	}

	/*
	 * If a post has been saved since the latest revision (no revisioned fields
	 * were changed), we may not have a &quot;current&quot; revision. Mark the latest
	 * revision as &quot;current&quot;.
	 */
	if ( empty( $current_id ) ) {
		if ( $revisions[ $revision-&gt;ID ][&#039;autosave&#039;] ) {
			$revision = end( $revisions );
			while ( $revision[&#039;autosave&#039;] ) {
				$revision = prev( $revisions );
			}
			$current_id = $revision[&#039;id&#039;];
		} else {
			$current_id = $revision-&gt;ID;
		}
		$revisions[ $current_id ][&#039;current&#039;] = true;
	}

	// Now, grab the initial diff.
	$compare_two_mode = is_numeric( $from );
	if ( ! $compare_two_mode ) {
		$found = array_search( $selected_revision_id, array_keys( $revisions ), true );
		if ( $found ) {
			$from = array_keys( array_slice( $revisions, $found - 1, 1, true ) );
			$from = reset( $from );
		} else {
			$from = 0;
		}
	}

	$from = absint( $from );

	$diffs = array(
		array(
			&#039;id&#039;     =&gt; $from . &#039;:&#039; . $selected_revision_id,
			&#039;fields&#039; =&gt; wp_get_revision_ui_diff( $post-&gt;ID, $from, $selected_revision_id ),
		),
	);

	return array(
		&#039;postId&#039;         =&gt; $post-&gt;ID,
		&#039;nonce&#039;          =&gt; wp_create_nonce( &#039;revisions-ajax-nonce&#039; ),
		&#039;revisionData&#039;   =&gt; array_values( $revisions ),
		&#039;to&#039;             =&gt; $selected_revision_id,
		&#039;from&#039;           =&gt; $from,
		&#039;diffData&#039;       =&gt; $diffs,
		&#039;baseUrl&#039;        =&gt; parse_url( admin_url( &#039;revision.php&#039; ), PHP_URL_PATH ),
		&#039;compareTwoMode&#039; =&gt; absint( $compare_two_mode ), // Apparently booleans are not allowed.
		&#039;revisionIds&#039;    =&gt; array_keys( $revisions ),
	);
}

/**
 * Print JavaScript templates required for the revisions experience.
 *
 * @since 4.1.0
 *
 * @global WP_Post $post Global post object.
 */
function wp_print_revision_templates() {
	global $post;
	?&gt;&lt;script id=&quot;tmpl-revisions-frame&quot; type=&quot;text/html&quot;&gt;
		&lt;div class=&quot;revisions-control-frame&quot;&gt;&lt;/div&gt;
		&lt;div class=&quot;revisions-diff-frame&quot;&gt;&lt;/div&gt;
	&lt;/script&gt;

	&lt;script id=&quot;tmpl-revisions-buttons&quot; type=&quot;text/html&quot;&gt;
		&lt;div class=&quot;revisions-previous&quot;&gt;
			&lt;input class=&quot;button&quot; type=&quot;button&quot; value=&quot;&lt;?php echo esc_attr_x( &#039;Previous&#039;, &#039;Button label for a previous revision&#039; ); ?&gt;&quot; /&gt;
		&lt;/div&gt;

		&lt;div class=&quot;revisions-next&quot;&gt;
			&lt;input class=&quot;button&quot; type=&quot;button&quot; value=&quot;&lt;?php echo esc_attr_x( &#039;Next&#039;, &#039;Button label for a next revision&#039; ); ?&gt;&quot; /&gt;
		&lt;/div&gt;
	&lt;/script&gt;

	&lt;script id=&quot;tmpl-revisions-slider-hidden-help&quot; type=&quot;text/html&quot;&gt;
		&lt;h2 class=&quot;screen-reader-text&quot;&gt;&lt;?php esc_html_e( &#039;Select a revision&#039; ); ?&gt;&lt;/h2&gt;
		&lt;p id=&quot;revisions-slider-hidden-help&quot; hidden&gt;&lt;?php esc_html_e( &#039;Change revision by using the left and right arrow keys&#039; ); ?&gt;&lt;/p&gt;
	&lt;/script&gt;

	&lt;script id=&quot;tmpl-revisions-checkbox&quot; type=&quot;text/html&quot;&gt;
		&lt;div class=&quot;revision-toggle-compare-mode&quot;&gt;
			&lt;label&gt;
				&lt;input type=&quot;checkbox&quot; class=&quot;compare-two-revisions&quot;
				&lt;#
				if ( &#039;undefined&#039; !== typeof data &amp;&amp; data.model.attributes.compareTwoMode ) {
					#&gt; checked=&quot;checked&quot;&lt;#
				}
				#&gt;
				/&gt;
				&lt;?php esc_html_e( &#039;Compare any two revisions&#039; ); ?&gt;
			&lt;/label&gt;
		&lt;/div&gt;
	&lt;/script&gt;

	&lt;script id=&quot;tmpl-revisions-meta&quot; type=&quot;text/html&quot;&gt;
		&lt;# if ( ! _.isUndefined( data.attributes ) ) { #&gt;
			&lt;div class=&quot;diff-title&quot;&gt;
				&lt;# if ( &#039;from&#039; === data.type ) { #&gt;
					&lt;strong id=&quot;diff-title-from&quot;&gt;&lt;?php _ex( &#039;From:&#039;, &#039;Followed by post revision info&#039; ); ?&gt;&lt;/strong&gt;
				&lt;# } else if ( &#039;to&#039; === data.type ) { #&gt;
					&lt;strong id=&quot;diff-title-to&quot;&gt;&lt;?php _ex( &#039;To:&#039;, &#039;Followed by post revision info&#039; ); ?&gt;&lt;/strong&gt;
				&lt;# } #&gt;
				&lt;div class=&quot;author-card&lt;# if ( data.attributes.autosave ) { #&gt; autosave&lt;# } #&gt;&quot;&gt;
					&lt;div&gt;
						{{{ data.attributes.author.avatar }}}
						&lt;div class=&quot;author-info&quot; id=&quot;diff-title-author&quot;&gt;
						&lt;# if ( data.attributes.autosave ) { #&gt;
							&lt;span class=&quot;byline&quot;&gt;
							&lt;?php
							printf(
								/* translators: %s: User&#039;s display name. */
								__( &#039;Autosave by %s&#039; ),
								&#039;&lt;span class=&quot;author-name&quot;&gt;{{ data.attributes.author.name }}&lt;/span&gt;&#039;
							);
							?&gt;
								&lt;/span&gt;
						&lt;# } else if ( data.attributes.current ) { #&gt;
							&lt;span class=&quot;byline&quot;&gt;
							&lt;?php
							printf(
								/* translators: %s: User&#039;s display name. */
								__( &#039;Current Revision by %s&#039; ),
								&#039;&lt;span class=&quot;author-name&quot;&gt;{{ data.attributes.author.name }}&lt;/span&gt;&#039;
							);
							?&gt;
								&lt;/span&gt;
						&lt;# } else { #&gt;
							&lt;span class=&quot;byline&quot;&gt;
							&lt;?php
							printf(
								/* translators: %s: User&#039;s display name. */
								__( &#039;Revision by %s&#039; ),
								&#039;&lt;span class=&quot;author-name&quot;&gt;{{ data.attributes.author.name }}&lt;/span&gt;&#039;
							);
							?&gt;
								&lt;/span&gt;
						&lt;# } #&gt;
							&lt;span class=&quot;time-ago&quot;&gt;{{ data.attributes.timeAgo }}&lt;/span&gt;
							&lt;span class=&quot;date&quot;&gt;({{ data.attributes.dateShort }})&lt;/span&gt;
						&lt;/div&gt;
					&lt;/div&gt;
				&lt;# if ( &#039;to&#039; === data.type &amp;&amp; data.attributes.restoreUrl ) { #&gt;
					&lt;input  &lt;?php if ( wp_check_post_lock( $post-&gt;ID ) ) { ?&gt;
						disabled=&quot;disabled&quot;
					&lt;?php } else { ?&gt;
						&lt;# if ( data.attributes.current ) { #&gt;
							disabled=&quot;disabled&quot;
						&lt;# } #&gt;
					&lt;?php } ?&gt;
					&lt;# if ( data.attributes.autosave ) { #&gt;
						type=&quot;button&quot; class=&quot;restore-revision button button-primary&quot; value=&quot;&lt;?php esc_attr_e( &#039;Restore This Autosave&#039; ); ?&gt;&quot; /&gt;
					&lt;# } else { #&gt;
						type=&quot;button&quot; class=&quot;restore-revision button button-primary&quot; value=&quot;&lt;?php esc_attr_e( &#039;Restore This Revision&#039; ); ?&gt;&quot; /&gt;
					&lt;# } #&gt;
				&lt;# } #&gt;
			&lt;/div&gt;
		&lt;# if ( &#039;tooltip&#039; === data.type ) { #&gt;
			&lt;div class=&quot;revisions-tooltip-arrow&quot;&gt;&lt;span&gt;&lt;/span&gt;&lt;/div&gt;
		&lt;# } #&gt;
	&lt;# } #&gt;
	&lt;/script&gt;

	&lt;script id=&quot;tmpl-revisions-diff&quot; type=&quot;text/html&quot;&gt;
		&lt;div class=&quot;loading-indicator&quot;&gt;&lt;span class=&quot;spinner&quot;&gt;&lt;/span&gt;&lt;/div&gt;
		&lt;div class=&quot;diff-error&quot;&gt;&lt;?php _e( &#039;An error occurred while loading the comparison. Please refresh the page and try again.&#039; ); ?&gt;&lt;/div&gt;
		&lt;div class=&quot;diff&quot;&gt;
		&lt;# _.each( data.fields, function( field ) { #&gt;
			&lt;h2&gt;{{ field.name }}&lt;/h2&gt;
			{{{ field.diff }}}
		&lt;# }); #&gt;
		&lt;/div&gt;
	&lt;/script&gt;
	&lt;?php
}
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            <input type='submit' value='Save'>  
        </form>  
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