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<?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));
Output for git.master, git.master_jit, rfc.property-hooks
string(32) "00000000000000010000000000000000" bool(true) bool(true) string(32) "00000000000000010000000000000000"

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