PHP并发HTTP请求？

composer require guzzlehttp/guzzle

require 'vendor/autoload.php';

use GuzzleHttp\Client;
use GuzzleHttp\Promise;

$client = new Client(['base_uri' => 'https://httpbin.org']);

$promises = [
    $client->getAsync('/get'),
    $client->getAsync('/get?foo=bar'),
    $client->getAsync('/get?foo=baz'),
];

// 等待所有请求完成
$results = Promise\all($promises)->wait();

// 输出响应内容
foreach ($results as $result) {
    echo $result->getBody();
}

pecl install pthreads

class HttpRequestThread extends Thread {
    private $url;

    public function __construct($url) {
        $this->url = $url;
    }

    public function run() {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $this->url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        $output = curl_exec($ch);
        curl_close($ch);

        echo $output;
    }
}

$threads = [
    new HttpRequestThread('https://httpbin.org/get'),
    new HttpRequestThread('https://httpbin.org/get?foo=bar'),
    new HttpRequestThread('https://httpbin.org/get?foo=baz'),
];

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

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