Online PHP editor | refs for 8a6Pd

<?php class Document extends DOMDocument { } function foo() { $document = new Document(); var_dump(spl_object_hash($document)); $document->registerNodeClass("DOMDocument", "Document"); $element = $document->appendChild($document->createElement('div')); var_dump($element->ownerDocument instanceOf Document); return $element; } $element = foo(); var_dump($element->ownerDocument instanceOf Document, spl_object_hash($element->ownerDocument));