session_start();
            header("Access-Control-Allow-Origin: *");
                   $message=array();
                   $message['msisdn']=$_POST['msisdn'];
                   $message['amount']=$_POST['amount'];
                   $message['firstname']=$_POST['firstname'];
                   $message['lastname']=$_POST['lastname'];
                   $message['transref']=time();
                   $message['clientid']=$_POST['clientid'];
                 $message['comment']="null";
                   $context  = "http://example_url_or_ip";
                   $username = "user";
                   $password = "password";
                   function callAPI($method, $url, $data){
              $curl = curl_init();
              switch ($method){
                 case "POST":
                    curl_setopt($curl, CURLOPT_POST, 1);
                    if ($data)
                       curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
                    break;
                 case "PUT":
                    curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "PUT");
                    if ($data)
                       curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
                    break;
                 default:
                    if ($data)
                       $url = sprintf("%s?%s", $url, http_build_query($data));
              }
              // OPTIONS:
              curl_setopt($curl, CURLOPT_URL, $url);
              curl_setopt($curl, CURLOPT_HTTPHEADER, array(
                 //'APIKEY: 111111111111111111111',
                 'Content-Type: application/json',
                 'Authorization: Basic '. base64_encode("$username:$password")
              ));
              curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
              curl_setopt($curl, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
              // EXECUTE:
              $result = curl_exec($curl);
              if(!$result){die("Connection Failure");}
              curl_close($curl);
              return $result;
           }
           ////////////////////////////////////////////////////////////////////////////////
            $make_call = callAPI(
               'POST',
               "$context/QosicBridge/user/requestpayment",
               json_encode($message)
               );

            $response = json_decode($make_call, true);
           /////////////////////////////////////////////////////////////////

             $_SESSION['transref']=$response['transref'];
             $_SESSION['clientid']=$message['clientid'];