$ > pecl install swoole

$ > php -r "readfile('https://getcomposer.org/installer');" | php -- --install-dir=/usr/local/bin/ --filename=composer
$ > composer self-update

$ > php -r "readfile('http://install.phpcomposer.com/installer');" | php -- --install-dir=/usr/local/bin/ --filename=composer
$ > composer config -g repo.packagist composer https://packagist.phpcomposer.com
$ > composer self-update

$ > composer create-project topthink/think thinkSwooleFirst --prefer-dist

$ > composer require topthink/think-swoole

 1 <?php
 2 namespace app\index\controller;
 3 
 4 // 必须 use 并继承 \think\swoole\Server 类
 5 use think\swoole\Server;
 6 
 7 class Demon extends Server
 8 {
 9     // 监听所有地址
10     protected $host = '0.0.0.0';
11     // 监听 9501 端口
12     protected $port = 9501;
13     // 指定运行模式为多进程
14     protected $mode = SWOOLE_PROCESS;
15     // 指定 socket 的类型为 ipv4 的 tcp socket
16     protected $sockType = SWOOLE_SOCK_TCP;
17     // 配置项
18     protected $option = [
19         /** 
20          *  设置启动的worker进程数
21          *  业务代码是全异步非阻塞的，这里设置为CPU的1-4倍最合理
22          *  业务代码为同步阻塞，需要根据请求响应时间和系统负载来调整
23          */
24         'worker_num' => 4,
25         // 守护进程化
26         'daemonize'  => true,
27         // 监听队列的长度
28         'backlog'    => 128
29     ];
30 
31     /**
32      * 收到信息时回调函数
33      * @param \swoole_server $serv swoole_server对象
34      * @param $fd TCP客户端连接的文件描述符
35      * @param $from_id TCP连接所在的Reactor线程ID
36      * @param $data 收到的数据内容
37      */
38     public function onReceive(\swoole_server $server, $fd, $from_id, $data)
39     {
40         $server->send($fd, 'onReceive: ' . $data);
41     }
42 }

$ > php public/index.php index/Demon/start

$ > lsof -i:9501

telnet 127.0.0.1 9501

onReceive: hello