morozovsk\websocket\GenericSelect::_createTimer PHP Method

    protected function _createTimer()
    {
        $pair = stream_socket_pair(STREAM_PF_UNIX, STREAM_SOCK_STREAM, STREAM_IPPROTO_IP);
        $pid = pcntl_fork();
        //create a fork
        if ($pid == -1) {
            die("error: pcntl_fork\r\n");
        } elseif ($pid) {
            //parent
            fclose($pair[0]);
            return $pair[1];
            //one of the pair will be in the parent
        } else {
            //child process
            fclose($pair[1]);
            $parent = $pair[0];
            //second of the pair will be in the child
            while (true) {
                fwrite($parent, '1');
                usleep($this->timer * 1000000);
            }
        }
    }