happ/vendor/workerman/channel/test/server.php

<?php
use Workerman\Worker;
use Workerman\Lib\Timer;

// composer autoload
include __DIR__ . '/../vendor/autoload.php';

$channel_server = new Channel\Server();

$worker = new Worker();
$worker->onWorkerStart = function()
{
    Channel\Client::on('test event', function($event_data){
        echo 'test event triggered event_data :';
        var_dump($event_data);
    });
    Timer::add(5, function(){
        Channel\Client::publish('test event', 'some data');
    });
};

Worker::runAll();