Remove script tags from html

remove_script_tags.php

<?php
function removeDomNodes($html, $xpathString)
{
    $dom = new DOMDocument;
    $dom->loadHtml($html);

    $xpath = new DOMXPath($dom);
    while ($node = $xpath->query($xpathString)->item(0)) {
        $node->parentNode->removeChild($node);
    }
    return $dom->saveHTML();
}

// remove comments
removeDomNodes($html, '//comment()');

// remove script tags
removeDomNodes($html, '//script');