回答

<?php

class Server
{
    private $serv;

    public function __construct() {
        $this->serv = new swoole_websocket_server("0.0.0.0", 9501);
        $this->serv->set([
            'worker_num'      => 2, //开启2个worker进程
            'max_request'     => 4, //每个worker进程 max_request设置为4次
            'task_worker_num' => 4, //开启4个task进程
            'dispatch_mode'   => 4, //数据包分发策略 - IP分配
            'daemonize'       => false, //守护进程(true/false)
        ]);

        $this->serv->on('Start', [$this, 'onStart']);
        $this->serv->on('Open', [$this, 'onOpen']);
        $this->serv->on("Message", [$this, 'onMessage']);
        $this->serv->on("Request", [$this, 'onRequest']);
        $this->serv->on("Close", [$this, 'onClose']);
        $this->serv->on("Task", [$this, 'onTask']);
        $this->serv->on("Finish", [$this, 'onFinish']);

        //监听 9502 端口
        $tcp = $this->serv->listen("0.0.0.0", 9502, SWOOLE_SOCK_TCP);
        $tcp->set([
            'worker_num'      => 2, //开启2个worker进程
            'max_request'     => 4, //每个worker进程 max_request设置为4次
            'dispatch_mode'   => 2, //数据包分发策略 - 固定模式

            //固定包头+包体协议
            'open_length_check'     => true,
            'package_max_length'    => '8192',
            'package_length_type'   => 'N',
            'package_length_offset' => '0',
            'package_body_offset'   => '4',
        ]);
        $tcp->on("Receive", [$this, 'onReceive']);

        //监听 9503 端口
        $udp = $this->serv->listen("0.0.0.0", 9503, SWOOLE_SOCK_UDP);
        $udp->set([
            'worker_num'      => 2, //开启2个worker进程
            'max_request'     => 4, //每个worker进程 max_request设置为4次
            'dispatch_mode'   => 2, //数据包分发策略 - 固定模式
        ]);
        $udp->on("Packet", [$this, 'onPacket']);

        $this->serv->start();
    }

    public function onStart($serv) {
        echo "#### onStart ####".PHP_EOL;
        echo "SWOOLE ".SWOOLE_VERSION . " 服务已启动".PHP_EOL;
        echo "master_pid: {$serv->master_pid}".PHP_EOL;
        echo "manager_pid: {$serv->manager_pid}".PHP_EOL;
        echo "########".PHP_EOL.PHP_EOL;
    }

    public function onOpen($serv, $request) {
        echo "#### onOpen ####".PHP_EOL;
        echo "server: handshake success with fd{$request->fd}".PHP_EOL;
        $serv->task([
            'type' => 'login'
        ]);
        echo "########".PHP_EOL.PHP_EOL;
    }

    public function onTask($serv, $task_id, $from_id, $data) {
        echo "#### onTask ####".PHP_EOL;
        echo "#{$serv->worker_id} onTask: [PID={$serv->worker_pid}]: task_id={$task_id}".PHP_EOL;
        $msg = '';
        switch ($data['type']) {
            case 'login':
                $msg = '我来了...';
                break;
            case 'speak':
                $msg = $data['msg'];
                break;
        }
        foreach ($serv->connections as $fd) {
            $connectionInfo = $serv->connection_info($fd);
            if (isset($connectionInfo['websocket_status']) && $connectionInfo['websocket_status'] == 3) {
                $serv->push($fd, $msg); //长度最大不得超过2M
            }
        }
        $serv->finish($data);
        echo "########".PHP_EOL.PHP_EOL;
    }

    public function onFinish($serv,$task_id, $data) {
        echo "#### onFinish ####".PHP_EOL;
        echo "Task {$task_id} 已完成".PHP_EOL;
        echo "########".PHP_EOL.PHP_EOL;
    }

    public function onClose($serv, $fd) {
        echo "#### onClose ####".PHP_EOL;
        echo "client {$fd} closed".PHP_EOL;
        echo "########".PHP_EOL.PHP_EOL;
    }

    public function onMessage($serv, $frame) {
        echo "#### onMessage ####".PHP_EOL;
        echo "receive from fd{$frame->fd}:{$frame->data},opcode:{$frame->opcode},fin:{$frame->finish}".PHP_EOL;
        $serv->task(['type' => 'speak', 'msg' => $frame->data]);
        echo "########".PHP_EOL.PHP_EOL;
    }

    public function onRequest($request, $response) {
        echo "#### onRequest ####".PHP_EOL;
        $response->header("Content-Type", "text/html; charset=utf-8");
        $server = $request->server;
        $path_info    = $server['path_info'];
        $request_uri  = $server['request_uri'];

        echo "PATH_INFO:".$path_info.PHP_EOL;

        if ($path_info == '/favicon.ico' || $request_uri == '/favicon.ico') {
            return $response->end();
        }

        $html = "<h1>你好 Swoole.</h1>";
        $response->end($html);
    }

    public function onReceive($serv, $fd, $from_id, $data) {
        echo "#### onReceive ####".PHP_EOL;

        $length = unpack('N', $data)[1];
        echo "Length:".$length.PHP_EOL;
        $msg = substr($data, -$length);
        echo "Msg:".$msg.PHP_EOL;
    }

    public function onPacket($serv, $data, $clientInfo) {
        echo "#### onPacket ####".PHP_EOL;
        $serv->sendto($clientInfo['address'], $clientInfo['port'], "Server ".$data);
        var_dump($clientInfo);
    }
}

$server = new Server();