ElephantIO\Engine\SocketIO\Version1X::write PHP Method

    public function write($code, $message = null)
    {
        if (!is_resource($this->stream)) {
            return;
        }
        if (!is_int($code) || 0 > $code || 6 < $code) {
            throw new InvalidArgumentException('Wrong message type when trying to write on the socket');
        }
        $payload = new Encoder($code . $message, Encoder::OPCODE_TEXT, true);
        $bytes = fwrite($this->stream, (string) $payload);
        // wait a little bit of time after this message was sent
        usleep((int) $this->options['wait']);
        return $bytes;
    }