PHP 多线程异步数据采集

<?php
require_once(__DIR__ . '/vendor/autoload.php');

$client = new \GuzzleHttp\Client();
// $request = new \GuzzleHttp\Psr7\Request('GET', 'https://www.baidu.com');

$promises = [];
for ($i = 0; $i < 10; $i++) {
    $promises = $client->requestAsync('GET', 'https://www.baidu.com')->then(function($response) use ($i) {
        echo "$i => I completed" . PHP_EOL;
    });
}

\GuzzleHttp\Promise\settle($promises)->wait();