RestClient::format_query PHP Метод

    public function format_query($parameters, $primary = '=', $secondary = '&')
    {
        $query = "";
        foreach ($parameters as $key => $values) {
            foreach (is_array($values) ? $values : [$values] as $value) {
                $pair = [urlencode($key), urlencode($value)];
                $query .= implode($primary, $pair) . $secondary;
            }
        }
        return rtrim($query, $secondary);
    }