protected function setParams(array $args)
    {
        if (!empty($args)) {
            $request = '?';
        } else {
            $request = '';
        }

        foreach ($args as $key => $value) {
            if (is_numeric($key)) {
                if ($request != '?') {
                    $request .= '&';
                }
                $request .= $value;
            } elseif (is_string($key)) {
                if ($request != '?') {
                    $request .= '&';
                }
                $request .= $key.'='.$value;
            }
        }

        return $request;
    }