如何实现PHP底层的高并发处理

<?php
class MyThread extends Thread {
    public function __construct($i) {
        $this->i = $i;
    }

    public function run() {
        echo "Thread {$this->i} is running
";
        sleep(1);
        echo "Thread {$this->i} is finished
";
    }
}

$threads = [];
for ($i = 0; $i < 10; $i++) {
    $threads[$i] = new MyThread($i);
    $threads[$i]->start();
}

foreach ($threads as $thread) {
    $thread->join();
}

<?php
Coun(function () {
    for ($i = 0; $i < 10; $i++) {
        Go(function () use ($i) {
            echo "Coroutine {$i} is running
";
            co::sleep(1);
            echo "Coroutine {$i} is finished
";
        });
    }
});

<?php
$server = new swoole_websocket_server("0.0.0.0", 9502);
$server->on('open', function (swoole_WEBSocket_server $server, $request) {
    echo "connection open: {$request->fd}
";
});
$server->on('message', function (swoole_websocket_server $server, $frame) {
    echo "received message: {$frame->data}
";
});
$server->on('close', function (swoole_websocket_server $server, $fd) {
    echo "connection close: {$fd}
";
});
$server->start();