swoole_exmple/Server/tcp.php

<?php
/**
 * TCP服务端类
 * User: fantasticbin
 * Date: 2020/1/15
 */
class Tcp
{
    const HOST = '127.0.0.1';
    const PORT = 9502;
    const WORKER_NUM = 2;
    const MAX_REQUEST = 10000;

    public $server = null;

    public function __construct()
    {
        // 创建TCP服务器，第四个参数默认指定为TCP，监听 127.0.0.1:9501 端口
        $this->server = new Swoole\Server(self::HOST, self::PORT);

        // 设置TCP服务器参数
        $this->server->set([
            'worker_num' => self::WORKER_NUM,
            'max_request' => self::MAX_REQUEST
        ]);

        // 监听连接进入事件
        $this->server->on('Connect', [$this, 'onConnect']);
        // 监听数据接收事件
        $this->server->on('Receive', [$this, 'onReceive']);
        // 监听连接关闭事件
        $this->server->on('Close', [$this, 'onClose']);
    }

    /**
     * 监听连接进入事件
     * @param $serv Swoole\Server TCP对象
     * @param $client_id int 客户端连接ID
     * @param $reactor_id int 线程ID
     */
    public function onConnect($serv, $client_id, $reactor_id)
    {
        echo 'Client: Connect.' . PHP_EOL . 'This client id: ' . $client_id . PHP_EOL . 'This reactor id: ' . $reactor_id . PHP_EOL;
    }

    /**
     * 监听数据接收事件
     * @param $serv Swoole\Server TCP对象
     * @param $client_id int 客户端连接ID
     * @param $reactor_id int 线程ID
     * @param $data string 客户端传入的字符串
     */
    public function onReceive($serv, $client_id, $reactor_id, $data)
    {
        $serv->send($client_id, 'This client id: ' . $client_id . PHP_EOL . 'This reactor id: ' . $reactor_id . PHP_EOL . 'Hello ' . $data . '!' . PHP_EOL);
    }

    /**
     * 监听连接关闭事件
     * @param $serv Swoole\Server TCP对象
     * @param $client_id int 客户端连接ID
     */
    public function onClose($serv, $client_id)
    {
        echo 'Client: Client ' . $client_id . ' close.' . PHP_EOL;
    }

    /**
     * 启动TCP服务器
     */
    public function start()
    {
        $this->server->start();
    }
}

$tcp = new Tcp();
$tcp->start();