Николай Васильчук

public static function launch() {
    if ($controller = self::getParam('controller')) {
      self::$controller = $controller;
    }
    if ($action = self::getParam('action')) {
      self::$action = $action;
    }

    $controllerName = strtolower(self::$controller).'Controller';
    $controllerAction = 'execute'.ucfirst(strtolower(self::$action));
    $controller = new $controllerName();
    if (!method_exists($controller, $controllerAction)) {
      throw new NotFoundException('Method \''.$controllerName.'::'.$controllerAction.'\' not found');
    }
    $controller->$controllerAction();
  }

  public static function getParam($param_name, $type = 'string') {
    if (isset($_GET[$param_name])) {
      if (!isset(self::$params[$param_name])) {
        self::$params[$param_name] = self::clean($_GET[$param_name], $type);
      }
      return self::$params[$param_name];
    }
    return NULL;
  }