Where to write validation rules?

Question

Laravel

Where to write validation rules? In the model or in the controller?

Answer 1

In Laravel - in the controller
In Yii - in the model

Answer 2

That's what Form Requests are for.

Answer 3

In Requests

Answer 4

)) Where tool developers recommend doing it (framework, CMS, etc.)
If you write your own tool and stick to the MCV model, the answer is: in the model.