private function http_curl($url,$type='get',$res='json',$arr=''){       $req = curl_init();       curl_setopt($req, CURLOPT_URL, $url);       curl_setopt($req, CURLOPT_RETURNTRANSFER, 1);       curl_setopt($req, CURLOPT_FOLLOWLOCATION, 1);       curl_setopt($req, CURLOPT_HEADER,'text/html; charset=UTF-8');       if ($type == 'post') {           curl_setopt($req,CURLOPT_POST,1);           curl_setopt($req,CURLOPT_POSTFIELDS,$arr);       }       $reqrst = curl_exec($req);       if($res == 'json'){           if (curl_errno($req) ){               return curl_error($req);           }           return json_decode($reqrst,true);       }       return $reqrst;    }