协程风格的TCP服务器问题，如何顺序处理事件

[jinuary]

Please answer these questions before submitting your issue.

协程风格的TCP服务器，如何顺序处理 Connect、Receive、Close 事件。如何像正常的tcp服务那样，分步处理start、receive、close事件
还有官方文档提供的完整示例有问题，找一个第三方socket客户端去连接直接就关闭了，提示errCode: 110, errMsg: Connection timed out，data==='' 和data===false 分别代表什么意思

1. 来源官方文档：https://wiki.swoole.com/#/coroutine/server

use Swoole\Process;
use Swoole\Coroutine;
use Swoole\Coroutine\Server\Connection;

//多进程管理模块
$pool = new Process\Pool(2);
//让每个OnWorkerStart回调都自动创建一个协程
$pool->set(['enable_coroutine' => true]);
$pool->on('workerStart', function ($pool, $id) {
    //每个进程都监听9501端口
    $server = new Swoole\Coroutine\Server('127.0.0.1', 9501, false, true);

    //收到15信号关闭服务
    Process::signal(SIGTERM, function () use ($server) {
        $server->shutdown();
    });

    //接收到新的连接请求 并自动创建一个协程
    $server->handle(function (Connection $conn) {
        while (true) {
            //接收数据
            $data = $conn->recv(1);

            if ($data === '' || $data === false) {
                $errCode = swoole_last_error();
                $errMsg = socket_strerror($errCode);
                echo "errCode: {$errCode}, errMsg: {$errMsg}\n";
                $conn->close();
                break;
            }

            //发送数据
            $conn->send('hello');

            Coroutine::sleep(1);
        }
    });

    //开始监听端口
    $server->start();
});
$pool->start();

swoole

Swoole => enabled
Author => Swoole Team <team@swoole.com>
Version => 5.0.0
Built => Aug 29 2022 10:45:14
coroutine => enabled with boost asm context
epoll => enabled
eventfd => enabled
signalfd => enabled
cpu_affinity => enabled
spinlock => enabled
rwlock => enabled
sockets => enabled
http2 => enabled
json => enabled
pcre => enabled
zlib => 1.2.11
mutex_timedlock => enabled
pthread_barrier => enabled
futex => enabled
async_redis => enabled

Directive => Local Value => Master Value
swoole.enable_coroutine => On => On
swoole.enable_library => On => On
swoole.enable_preemptive_scheduler => Off => Off
swoole.display_errors => On => On
swoole.use_shortname => On => On
swoole.unixsock_buffer_size => 8388608 => 8388608

[matyhtf]

仔细看下文档吧，上面代码不是有顺序的吗，空字符串表示关闭，false表示错误但需检查错误码

[jinuary]

仔细看下文档吧，上面代码不是有顺序的吗，空字符串表示关闭，false表示错误但需检查错误码

上面代码空和false哪有顺序啊，空字符串表示关闭这个没错，创建连接事件就是无法捕获。

我参考官网写的代码，客户端连接后发送数据。有得顺序是13，有得是31。13顺序下错误码是110，110代表连接超时，这错误码也不对啊