Mapper::parse PHP Method

    public static function parse($url = null)
    {
        $here = self::normalize(is_null($url) ? self::here() : $url);
        $url = self::getRoute($here);
        $prefixes = join('|', self::prefixes());
        $path = array();
        $parts = array('here', 'prefix', 'controller', 'action', 'extension', 'params', 'queryString');
        preg_match('/^\\/(?:(' . $prefixes . ')(?:\\/|(?!\\w)))?(?:([a-z_-]*)\\/?)?(?:([a-z_-]*)\\/?)?(?:\\.([\\w]+))?(?:\\/?([^?]+))?(?:\\?(.*))?/i', $url, $reg);
        foreach ($parts as $k => $key) {
            $path[$key] = isset($reg[$k]) ? $reg[$k] : null;
        }
        $path['named'] = $path['params'] = array();
        if (isset($reg[5])) {
            foreach (explode('/', $reg[5]) as $param) {
                if (preg_match('/([^:]*):([^:]*)/', $param, $reg)) {
                    $path['named'][$reg[1]] = urldecode($reg[2]);
                } else {
                    if ($param != '') {
                        $path['params'][] = urldecode($param);
                    }
                }
            }
        }
        $path['here'] = $here;
        if (empty($path['controller'])) {
            $path['controller'] = self::root();
        }
        if (empty($path['action'])) {
            $path['action'] = 'index';
        }
        if ($filtered = self::filterAction($path['action'])) {
            $path['prefix'] = $filtered['prefix'];
            $path['action'] = $filtered['action'];
        }
        if (!empty($path['prefix'])) {
            $path['action'] = $path['prefix'] . '_' . $path['action'];
        }
        if (empty($path['id'])) {
            $path['id'] = null;
        }
        if (empty($path['extension'])) {
            $path['extension'] = 'htm';
        }
        if (!empty($path['queryString'])) {
            parse_str($path['queryString'], $queryString);
            $path['named'] = array_merge($path['named'], $queryString);
        }
        return $path;
    }

 protected static function normalize($request)
 {
     if (is_null($request)) {
         $request = Mapper::parse();
     }
     $request['controller'] = Inflector::hyphenToUnderscore($request['controller']);
     $request['action'] = Inflector::hyphenToUnderscore($request['action']);
     return $request;
 }