think\Validate::getScene PHP Method

    protected function getScene($scene = '')
    {
        if (empty($scene)) {
            // 读取指定场景
            $scene = $this->currentScene;
        }
        if (!empty($scene) && isset($this->scene[$scene])) {
            // 如果设置了验证适用场景
            $scene = $this->scene[$scene];
            if (is_string($scene)) {
                $scene = explode(',', $scene);
            }
        } else {
            $scene = [];
        }
        return $scene;
    }