fXmlRpc\Transport\TransportInterface::send PHP Method

    public function send($endpoint, $payload);

 /** {@inheritdoc} */
 public function send($endpoint, $payload)
 {
     $this->lastResponse = $this->lastException = null;
     $this->lastRequest = $payload;
     try {
         $this->lastResponse = $this->transport->send($endpoint, $payload);
         return $this->lastResponse;
     } catch (Exception $e) {
         $this->lastException = $e;
         throw $e;
     }
 }