Online PHP editor | refs for gm41f

<?php class MyNode extends DOMNode { public function describe() { echo "I am a " . $this->tagName . " node!"; } } class MyElement extends DOMElement {} class MyDocument extends DOMDocument {} class MyNodeList extends DOMNodeList {} // this class is unused. $dom = new MyDocument(); $dom->registerNodeClass("DOMNode", "MyNode"); $dom->registerNodeClass("DOMElement", "MyElement"); // Can't do this, because DOMNodeList doesn't inherit from DOMNode. // $dom->registerNodeClass("DOMNodeList", "MyNodeList"); $dom->loadHTML("<!doctype html><h1>Hello, World!</h1>"); // The items within the DOMNodeList are MyElement objects... var_dump($dom->documentElement->childNodes->item(0)); // ...but why can't I use a MyNodeList here? var_dump($dom->documentElement->childNodes);