Curl获取url内容

function curl_file_get_contents($durl){
   $ch = curl_init();
   curl_setopt($ch, CURLOPT_URL, $durl);
   curl_setopt($ch, CURLOPT_TIMEOUT, 30);
   curl_setopt($ch, CURLOPT_USERAGENT, _USERAGENT_);
   curl_setopt($ch, CURLOPT_REFERER,_REFERER_);
   curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
   curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);  
   curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
   $r = curl_exec($ch);
   curl_close($ch);
   return $r;
 }