xyzshop/test/coroutine/tcp_backend_serv.php

<?php
$serv = new Swoole\Server("0.0.0.0", 9511);
$serv->set(array(
    'worker_num' => 1,   //工作进程数量
    'daemonize' => true, //是否作为守护进程
));
$serv->on('connect', function ($serv, $fd){
    echo "Client:Connect.\n";
});
$serv->on('receive', function ($serv, $fd, $reactor_id, $data) {
    $serv->send($fd, 'Swoole: '.$data);
    $serv->close($fd);
});
$serv->on('close', function ($serv, $fd) {
    echo "Client: Close.\n";
});
$serv->start();