CI_URI::_parse_query_string PHP Метод

    protected function _parse_query_string()
    {
        $uri = isset($_SERVER['QUERY_STRING']) ? $_SERVER['QUERY_STRING'] : @getenv('QUERY_STRING');
        if (trim($uri, '/') === '') {
            return '';
        } elseif (strncmp($uri, '/', 1) === 0) {
            $uri = explode('?', $uri, 2);
            $_SERVER['QUERY_STRING'] = isset($uri[1]) ? $uri[1] : '';
            $uri = $uri[0];
        }
        parse_str($_SERVER['QUERY_STRING'], $_GET);
        return $this->_remove_relative_directory($uri);
    }