Fix broken HTML using DOM hidden superpowers...

dommagic.php

<?php

$brokenhtml = '<p>this is broken</p>because i want to </div></div></div><script><script type="text/javascript"><!--';
echo fixhtmlplz($brokenhtml) . "\n\n";

$brokenhtml = '<b>because <i>I can leave <p>everything <div> unclosed
    using many <span> lines and <ul> more yet <li> lists
    <li> more and
    <li> more';
echo fixhtmlplz($brokenhtml) . "\n\n";

function fixhtmlplz($brokenhtml) {

    $preparehtml = '<?xml version="1.0" encoding="UTF-8"?><prepared>' . $brokenhtml . '</prepared>';

    $doc = new DomDocument();
    libxml_use_internal_errors(true);
    $doc->loadHTML($preparehtml);
    libxml_clear_errors();

    $temphtml = $doc->saveHTML($doc->getElementsByTagName('prepared')->item(0));
    $fixedhtml = preg_replace('#<prepared>(.*)</prepared>#s', '$1', $temphtml);

    return $fixedhtml;
}