app\components\User::checkAccessRoute PHP Method

    private function checkAccessRoute($permissionName, $params, $allowCaching)
    {
        $route = explode('_', $permissionName);
        $routePermission = '';
        foreach ($route as $part) {
            $routePermission .= $part;
            if (\Yii::$app->user->id) {
                $canRoute = parent::can($routePermission, $params, $allowCaching);
            } else {
                $canRoute = $this->canGuest($routePermission, $params, $allowCaching);
            }
            if ($canRoute) {
                return true;
            }
            $routePermission .= '_';
        }
        return false;
    }