- var_dump: documentation ( source)
<?php
$a = new DomElement('foo');
var_dump($a->ownerDocument);
$a = new DOMAttr('foo');
var_dump($a->ownerDocument);
$a = new DOMText('foo'); // for DOMCharacterData
var_dump($a->ownerDocument);
$a = new DOMProcessingInstruction('foo');
var_dump($a->ownerDocument);