uri-query-string.php

<?php

declare(strict_types=1);

use League\Uri\UriTemplate;
use League\Uri\Components\Query;

require 'vendor/autoload.php';

$template = 'https://api.twitter.com/{version}/{?q*}';
$params = ['q' => ['a', 'b']];

$uriTemplate = new UriTemplate($template, ['version' => '1.1']);
$uri = $uriTemplate->expand($params);

$query = Query::createFromUri($uri);
var_dump((string) $uri, $query->getAll('q'));