I am using Yii2 advanced template and trying to move my existing Yii-1 app inside a Yii-2 app. My goal is that Yii-1 runs as it is, without any changes. Then I can move individual functionality from my Yii-1 app into Yii-2. Thus I can selectively migrate from Yii-1 to Yii-2
- Is this a viable approach?
 - Is there any other way to move from Yii-1 to Yii-2, in parts?
 
For reference, this article describes the opposite of what I want to do i.e. put Yii-2 in Yii-1