Guzzle async example

guzzle.php

<?php
require_once('vendor/autoload.php');
use GuzzleHttp\Client as GuzzleClient;
use GuzzleHttp\Promise as GuzzlePromise;
//https://stackoverflow.com/a/32751004/3787302
$start_time = microtime(TRUE);

$client = new GuzzleClient(['timeout' => 12.0]); // see how i set a timeout
$requestPromises = [];
$sitesArray = [
    'http://vnexpress.net',
    'http://google.vn',
    'http://bbc.com'
];

foreach ($sitesArray as $k => $site) {
    $requestPromises[$k] = $client->getAsync($site);
}

$results = GuzzlePromise\settle($requestPromises)->wait();

foreach ($results as $domain => $result) {
    $site = $sitesArray[$domain];

    if ($result['state'] === 'fulfilled') {
        /** @var \GuzzleHttp\Psr7\Response $response */
        $response = $result['value'];
        if ($response->getStatusCode() == 200) {
            var_dump($response->getBody());
            echo '<br><hr>';
        } else {
            var_dump($response->getStatusCode());
        }
    } else if ($result['state'] === 'rejected') {
        // notice that if call fails guzzle returns is as state rejected with a reason.

        echo 'ERR: ' . var_dump($result['reason']);

    } else {
        echo 'ERR: unknown exception ';

    }


}

$end_time = microtime(TRUE);

echo $end_time - $start_time . "<br><hr>";

$start_time = microtime(TRUE);
foreach ($sitesArray as $item) {
    $client->request('GET', $item);
}

$end_time = microtime(TRUE);
echo $end_time - $start_time . "<br><hr>";

Thank you so much (y)