如何在 PHP 中实现异步 cURL 请求？

PHP 中的异步 cURL 请求

执行并行curl 请求有利于性能优化。本文提供了使用各种方法实现异步执行的见解。

异步 cURL

使用内置 cURL 函数的异步执行需要以下方法：

<code class="php">curl_setopt($ch, CURLOPT_URL, $url);
 curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
 curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
 curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
 curl_setopt($ch, CURLOPT_USERPWD, $api_onfleet);
 curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
 curl_setopt($ch, CURLOPT_ENCODING, "");  
 curl_setopt($ch, CURLOPT_POST, true);
 curl_setopt($ch, CURLOPT_POSTFIELDS, $params);

$mh = curl_multi_init();
curl_multi_add_handle($mh,$session);
curl_multi_add_handle($mh,$ch);</code>

pThreads

pThreads 提供了另一种异步执行方法：

<code class="php">class Request1 extends Thread {
    public function run() {
        // Your code here
    }
}

class Request2 extends Thread {
    public function run() {
        // Your code here
    }
}

$req1 = new Request1();
$req2 = new Request2();
$req1->start();
$req2->start();</code>

建议阅读

• [curl_multi_init()](https://www.php.net/manual/en/function.curl-multi-init.php)
• [curl_multi_exec()](https://www. php.net/manual/en/function.curl-multi-exec.php)
• [curl_multi_add_handle()](https://www.php.net/manual/en/function.curl-multi- add-handle.php)
• [class::Thread](https://www.php.net/manual/en/class.thread.php)
• [Thread::start ](https://www.php.net/manual/en/thread.start.php)

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