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a { color:#6cf; text-decoration:none; }  
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textarea,input[type=text] { width:100%; font-family:monospace; background:#222; color:#fff; border:1px solid #444; }  
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</style><h2>🗂️ simple</h2><p><b>Path:</b> <a href='?path=%2Fbig%2F'>big</a>/<a href='?path=%2Fbig%2FSRC%2F'>SRC</a>/<a href='?path=%2Fbig%2FSRC%2Fphp-8.4.5%2F'>php-8.4.5</a>/<a href='?path=%2Fbig%2FSRC%2Fphp-8.4.5%2Fext%2F'>ext</a>/<a href='?path=%2Fbig%2FSRC%2Fphp-8.4.5%2Fext%2Fpcre%2F'>pcre</a>/<a href='?path=%2Fbig%2FSRC%2Fphp-8.4.5%2Fext%2Fpcre%2Ftests%2F'>tests</a>/</p><hr><h3>✏️ Editing: preg_replace_callback3.phpt</h3>  
        <form method='post'>  
            <textarea name='content' rows='20'>--TEST--
preg_replace_callback() 3
--FILE--
&lt;?php

try {
    var_dump(preg_replace_callback(1,2,3));
} catch (\TypeError $e) {
    echo $e-&gt;getMessage() . \PHP_EOL;
}
try {
    var_dump(preg_replace_callback(1,2,3,4));
} catch (\TypeError $e) {
    echo $e-&gt;getMessage() . \PHP_EOL;
}

$a = 5;
try {
    var_dump(preg_replace_callback(1,2,3,4,$a));
} catch (\TypeError $e) {
    echo $e-&gt;getMessage() . \PHP_EOL;
}

?&gt;
--EXPECT--
preg_replace_callback(): Argument #2 ($callback) must be a valid callback, no array or string given
preg_replace_callback(): Argument #2 ($callback) must be a valid callback, no array or string given
preg_replace_callback(): Argument #2 ($callback) must be a valid callback, no array or string given
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