Network\Connection::is_connected PHP Метод

    public function is_connected()
    {
        if (!is_resource($this->get_resource())) {
            return false;
        }
        // peek into the connection reading 1 byte ... this works only
        // when there is data to read on the connection
        if (false === $this->_read_buffer(1, MSG_DONTWAIT ^ MSG_PEEK)) {
            return false;
        }
        // try and read data waiting on the connection into the buffer.
        $this->_read_buffer();
        $error = socket_get_option($this->get_resource(), SOL_SOCKET, SO_ERROR);
        if ($error !== 0) {
            $this->error = socket_last_error($this->get_resource());
            $this->error_str = socket_strerror($this->error);
            return false;
        }
        return true;
    }