Ratchet\ConnectionInterface::send PHP Метод

    function send($data);

 public function onOpen(ConnectionInterface $from, RequestInterface $request = null)
 {
     echo "New HTTP connection!\n";
     //Variables in URLs are not supported in Ratchet for now
     //See https://github.com/cboden/Ratchet/pull/143
     $requestPath = $request->getPath();
     $pathParts = explode('/', preg_replace('#^/peerjs/#', '', $requestPath));
     //Remove /peerjs
     $action = array_pop($pathParts);
     $peerToken = array_pop($pathParts);
     $peerId = array_pop($pathParts);
     $key = array_pop($pathParts);
     $respStatus = 200;
     $respHeaders = array('X-Powered-By' => \Ratchet\VERSION, 'Access-Control-Allow-Origin' => '*');
     $respBody = null;
     switch ($action) {
         case 'id':
             $respHeaders['Content-Type'] = 'text/html';
             if ($peerId === null) {
                 do {
                     $peerId = substr(sha1(uniqid('', true) . mt_rand()), 0, self::PEERID_LENGTH);
                 } while ($this->peerServer->peerIdExists($peerId));
             }
             $respBody = $peerId;
             break;
         case 'peers':
             if (self::ALLOW_DISCOVERY) {
                 $peers = $this->peerServer->listPeers();
                 $list = array();
                 foreach ($peers as $peer) {
                     $list[] = $peer['id'];
                 }
                 $respBody = $list;
             } else {
                 $respStatus = 401;
                 // Access denied
             }
             break;
         case 'offer':
         case 'candidate':
         case 'answer':
         case 'leave':
             //TODO: start streaming?
         //TODO: start streaming?
         default:
             $respStatus = 400;
             //Bad request
     }
     if (is_array($respBody)) {
         // Encode to JSON
         $respHeaders['Content-Type'] = 'application/json';
         $respBody = json_encode($respBody);
     }
     //Send response
     $response = new Response($respStatus, $respHeaders, (string) $respBody);
     $from->send((string) $response);
     $from->close();
 }