How to migrate a project from Codeigniter to Yii2?

Question

CodeIgniter

Hello!
In fact, there is a ready-made project on Codeigniter.
How to painlessly port it to Yii2?
In general, it is clear that you need to iterate over the controllers and models, but maybe there is some kind of technique or has someone already encountered this?
The biggest question is about replacing boxed methods. In general, I will be glad for any infe

Answer 1

How to painlessly port it to Yii2?

Painless - nothing, from the word "absolutely".
Rewrite block by block. It is quite possible that you will have to fiddle with basic initialization and it will be common. You can use the new code in the old code, but never vice versa .
Write wrappers to use in the old code of the new one.