求助，关于php采集url地址

http://www.discuz.net/forum-10-1.html

http://www.discuz.net/thread-3265731-1-1.html

$url = 'http://www.discuz.net/forum-10-1.html';$ch = curl_init();curl_setopt($ch, CURLOPT_URL,$url);curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2) Gecko/20100115 Firefox/3.6 (.NET CLR 3.5.30729)');$htmls = curl_exec($ch);curl_close($ch);$doc = new DOMDocument();libxml_use_internal_errors(true);$doc->loadHTML($htmls);$xpath = new DOMXPath($doc);$nodeList = $xpath->query('//a/@href');for ($i = 0; $i < $nodeList->length; $i++) {	if(preg_match('@\/thread\-@',$nodeList->item($i)->value,$match)){		echo $nodeList->item($i)->value. "<br/>";	}}