public function sendHandshakeResponse()
 {
     // Check for newer handshake
     $challenge = isset($this->_headers['Sec-Websocket-Key']) ? $this->_headers['Sec-Websocket-Key'] : null;
     // Build response
     $response = "HTTP/1.1 101 WebSocket Protocol Handshake\r\n" . "Upgrade: WebSocket\r\n" . "Connection: Upgrade\r\n";
     // Build HYBI response
     $response .= "Sec-WebSocket-Accept: " . WebSocketFunctions::calcHybiResponse($challenge) . "\r\n\r\n";
     $this->_socket->write($response);
     WebSocketFunctions::say("HYBI Response SENT!");
 }