錯(cuò)誤代碼示例：

Master::$globalEvent = new EventLoop();

Master::$globalEvent->add($mainSocket, function ($sock) {
    $newSocket = stream_socket_accept($sock, 0, $remoteAddress);

    \stream_set_blocking($newSocket, 0);
    // Compatible with hhvm
    if (\function_exists('stream_set_read_buffer')) {
        \stream_set_read_buffer($newSocket, 0);
    }

    echo 'remote address : ' . $remoteAddress . PHP_EOL;

// error1    $res = Master::$globalEvent->add($newSocket, [TcpConn::class, 'readBak'], 'stream_socket_accept');

//error2
    $res = Master::$globalEvent->add($newSocket, function ($socket) {
            $buff = fread($socket, 65536);

            echo "客戶端請(qǐng)求來(lái)了~\n";

            echo $buff . "\n";

            fwrite($socket, "HTTP/1.1 200 OK\r\nAccept: application/json, text/plain, */*\r\nConnection: keep-alive\r\nContent-Length: 6\r\n\r\nhello~");
//    }, 'stream_socket_accept');
}, 'stream_socket_server');

Master::$globalEvent->loop();

在第一次stream_socket_server之后，把服務(wù)端socket添加進(jìn)事件循環(huán)之后，在這個(gè)事件循環(huán)的閉包里，再次stream_socket_accept這個(gè)方法的調(diào)用，把新的連接再次丟入事件循環(huán)，這個(gè)時(shí)候，第二個(gè)閉包放的代碼不會(huì)執(zhí)行