Online PHP editor | refs for 041WD

<?php $html = <<<DATA Lorem Ipsum is simply dummy text Lorem Ipsum is <a href="http://www.google.com">simply</a> dummy text<a href="http://www.youtube.com/watch?v=DUQi_R4SgWo" target="_blank" rel="noopener">Check out the video here!</a>. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. <a href="http://www.youtube.com/watch?v=A_6gNZCkajU" target="_blank" rel="noopener">Video here</a> It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum. DATA; # set up the DOM $dom = new DOMDocument(); $dom->loadHTML($html, LIBXML_HTML_NODEFDTD | LIBXML_HTML_NOIMPLIED); # set up the xpath $xpath = new DOMXPath($dom); # set up the regex $xpath->registerNamespace('php', 'http://php.net/xpath'); $xpath->registerPHPFunctions('match'); $links = $xpath->query("a[php:functionString('match', @href)]"); function match($href) { $regex = '~\?v=([^&]+)~'; $rc = preg_match($regex, $href, $matches); var_dump($matches[1]); return $rc; }