phprs\ezsql\impls\WhereImpl::findQ PHP Метод

    private static function findQ($str, $offset = 0, $no = 0)
    {
        $found = strpos($str, '?', $offset);
        if ($no == 0 || $found === false) {
            return $found;
        }
        return self::findQ($str, $found + 1, $no - 1);
    }