router::map PHP Method

    function map()
    {
        $url = url::strip_query(server::get('request_uri'));
        $url = str_replace(rtrim(c::get('router.root'), '/'), '', $url);
        $method = r::method();
        foreach (self::$routes as $key => $route) {
            if (!in_array($method, $route['methods'])) {
                continue;
            }
            $key = str_replace(')', ')?', $key);
            $args = array();
            $regex = preg_replace_callback('#@([\\w]+)(:([^/\\(\\)]*))?#', function ($matches) use(&$args) {
                $args[$matches[1]] = null;
                if (isset($matches[3])) {
                    return '(?P<' . $matches[1] . '>' . $matches[3] . ')';
                }
                return '(?P<' . $matches[1] . '>[^/\\?]+)';
            }, $key);
            if (preg_match('#^' . $regex . '(?:\\?.*)?$#i', $url, $matches)) {
                foreach ($args as $k => $v) {
                    self::$params[$k] = array_key_exists($k, $matches) ? urldecode($matches[$k]) : null;
                }
                return $route['callback'];
            }
        }
        return false;
    }