PHP开发中如何优化异步任务调度和处理

<?php
$connection = new AMQPStreamConnection('localhost', 5672, 'guest', 'guest');
$channel = $connection->channel();

$channel->queue_declare('task_queue', false, true, false, false);

$callback = function($msg) {
  echo 'Received: ', $msg->body, "
";
};

$channel->basic_qos(null, 1, null);
$channel->basic_consume('task_queue', '', false, false, false, false, $callback);

while(count($channel->callbacks)) {
    $channel->wait();
}

$channel->close();
$connection->close();
?>

<?php
$jobs = array();
$workers = array(); // 进程数组

foreach ($jobs as $job) {
    $pid = pcntl_fork(); // 创建子进程
    if ($pid == -1) {
        // 创建失败
        die('Could not fork');
    } else if ($pid) {
        // 父进程
        $workers[] = $pid;
    } else {
        // 子进程
        // 处理任务
        exit();
    }
}

// 等待所有子进程结束
foreach ($workers as $pid) {
    pcntl_waitpid($pid, $status);
}

?>

<?php
$jobs = array();

foreach ($jobs as $job) {
    exec("crontab -l | { cat; echo "{$job}"; } | crontab -"); // 添加定时任务
    // exec("crontab -l | grep -v "{$job}" | crontab -"); // 删除定时任务
}
?>

<?php
$server = new Swoolehttpserver("127.0.0.1", 9501);

$server->on('Request', function($request, $response) {
    $response->header("Content-Type", "text/html; charset=utf-8");
    $response->end("Hello World
");
});

$server->start();
?>

<?php
Coun(function() {
    $cli = new SwooleCoroutineHttpClient('www.baidu.com', 80);
    $cli->set(['timeout' => 1]);
    $cli->setDefer();
    
    $cli->execute('/index');
    
    $content = $cli->body;
    $cli->close();
    
    echo $content;
});
?>

<?php
$redis = new Redis();
$redis->connect('127.0.0.1', 6379);

$key = 'cache_key';
if (!$redis->exists($key)) {
    // 缓存不存在，从数据库中获取数据
    $data = // 从数据库中获取数据
    
    // 将数据存入缓存
    $redis->set($key, $data);
    $redis->expire($key, 3600); // 设置过期时间
} else {
    // 从缓存中获取数据
    $data = $redis->get($key);
}

?>