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<?php class MyComment extends \DOMComment { } $dom = new DOMDocument(); $dom->registerNodeClass('DOMComment', 'MyComment'); var_dump($dom->createComment('Foo'));
Output for git.master, git.master_jit, rfc.property-hooks
object(MyComment)#2 (20) { ["data"]=> string(3) "Foo" ["length"]=> int(3) ["previousElementSibling"]=> NULL ["nextElementSibling"]=> NULL ["nodeName"]=> string(8) "#comment" ["nodeValue"]=> string(3) "Foo" ["nodeType"]=> int(8) ["parentNode"]=> NULL ["childNodes"]=> string(22) "(object value omitted)" ["firstChild"]=> NULL ["lastChild"]=> NULL ["previousSibling"]=> NULL ["nextSibling"]=> NULL ["attributes"]=> NULL ["ownerDocument"]=> string(22) "(object value omitted)" ["namespaceURI"]=> NULL ["prefix"]=> string(0) "" ["localName"]=> NULL ["baseURI"]=> NULL ["textContent"]=> string(3) "Foo" }

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