PHP cURL，提取XML响应

<?phpfunction download_page($path){    $ch = curl_init();    curl_setopt($ch, CURLOPT_URL,$path);    curl_setopt($ch, CURLOPT_FAILONERROR,1);    curl_setopt($ch, CURLOPT_FOLLOWLOCATION,1);    curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);    curl_setopt($ch, CURLOPT_TIMEOUT, 15);    $retValue = curl_exec($ch);   curl_close($ch);    return $retValue;}$sXML = download_page('http://alanstorm.com/atom');$oXML = new SimpleXMLElement($sXML);foreach($oXML->entry as $oEntry){    echo $oEntry->title . "n";}