liuniu/vendor/qiniu/php-sdk/examples/rs_buckets.php

<?php
require_once __DIR__ . '/../autoload.php';

use \Qiniu\Auth;

$accessKey = getenv('QINIU_ACCESS_KEY');
$secretKey = getenv('QINIU_SECRET_KEY');
$bucket = getenv('QINIU_TEST_BUCKET');


$auth = new Auth($accessKey, $secretKey);
$config = new \Qiniu\Config();
$bucketManager = new \Qiniu\Storage\BucketManager($auth, $config);
list($buckets, $err) = $bucketManager->buckets(true);
if ($err) {
    print_r($err);
} else {
    print_r($buckets);
}