3v4l.org

run code in 300+ PHP versions simultaneously

@ 2017-07-28T04:50:08Z

<?php


$str = "<input type=\"text\">\n<img src=\"\"><a href=\"\"><button type=\"button\"></button><div id=\"some\"></div><p></p>";
var_dump(removeTags($str, array('img')));

/**
 * Strip only certain tags in the given HTML string
 * @return String
 */
function removeTags($html, $tags){
    $existing_tags = getAllTagNames($html);
    $allowable_tags = '<'.implode('><', array_diff($existing_tags, $tags)).'>';
    return strip_tags($html, $allowable_tags);
}

/**
 * Get a list of tag names in the provided HTML string
 * @return Array
 */
function getAllTagNames($html){
    $tags = array();
    $part = explode("<", $html);
    foreach($part as $tag){
        $chunk = explode(" ", $tag);
        if(empty($chunk[0]) || $chunk[0][0] == "/") continue;
        $tag = trim($chunk[0], " >");
        if(!in_array($tag, $tags)) $tags[] = $tag;
    }
    return $tags;
}

Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: string(90) "<input type="text"> <a href=""><button type="button"></button><div id="some"></div><p></p>"
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 string(90) "<input type="text"> <a href=""><button type="button"></button><div id="some"></div><p></p>"

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336.47 ms | 402 KiB | 462 Q