How to implement factories in Yii2 and what are they for?

Question

Yii

I can't figure out how to implement them.
For example, I figured out the repositories. This simplifies working with the database
https://laravel.ru/posts/30 using this article as an example.
But what about factories?
Does anyone have a similar example?

Answer 1

Same as without Yii: https://sourcemaking.com/design_patterns/abstract_...