Online PHP editor | output for MEdVQ

<?php $content = '<iframe width="560" height="315" src="https://www.youtube.com/embed/W9k0OhJkjQ0" frameborder="0" allowfullscreen></iframe>'; $dom = new \DOMDocument( '1.0', 'UTF-8' ); // muted because malformed HTML cause warnings @$dom->loadXml( "<iframe_content>{$content}</iframe_content>" ); $domIframe = $dom->getElementsByTagName( 'iframe' ); // seems this iframe is not an iframe if ( ! $domIframe->length ) { echo 'No Iframe'; } /** @var \DOMElement $iframeNode */ $iframeNode = $domIframe->item( 0 ); $iframeNode->removeAttribute( 'width' ); $iframeNode->removeAttribute( 'height' ); echo $dom->saveHTML( $iframeNode );