IDCOL/websocket/udpTest.php

<?php
use Workerman\Worker;
require_once __DIR__ . '/Autoloader.php';
require_once './Lib/mysql/src/Connection.php';
use \Workerman\Lib\Timer;

$udp_worker = new Worker('udp://0.0.0.0:8608');
$udp_worker->onMessage = function($connection, $data){
    var_dump($data);
    $connection->send($data);
};
Worker::runAll();