Online PHP editor | output for Q0iA9

<?php $doc = new DOMDocument; $doc->loadHTML('<html><body id="x"><div id="y"></div></body></html>'); $body = $doc->getElementById('x'); $div = $doc->getElementById('y'); $node = (new DOMXPath($doc))->query('.//*[@id="y"]', $doc->documentElement)->item(0); echo '0: ' . ( $node ? $node->tagName : 'null' ) . PHP_EOL; $body->removeChild($div); $node = (new DOMXPath($doc))->query('.//*[@id="y"]', $doc->documentElement)->item(0); echo '1: ' . ( $node ? $node->tagName : 'null' ) . PHP_EOL;