DOMElement取不到，大侠帮我看看

Question

修改一下Page类就可以了.class Page extends DOMDocument {
    public $PageName;
    public function Page($pagename,$Resdoc){
       global $resultID;
       //parent::__construct();
        $this-> PageName=$pagename;
        $xmlstr = "<?xml version='1.0' encoding='utf-8'?><npl version='1.0'/>";
        $this->loadXML($xmlstr);
        //importNode是重点,呵呵.
        $entries = $this->importNode($Resdoc->documentElement, true);
        $this->documentElement->appendChild($entries);
    }
    public function addMessage($userName, $content, $postTime)
    {    }
    public function rewrite()
    {
        $this->save($this-> PageName.".xml");
    }
}