Yii 1 - how to properly organize a modular structure?

Question

Yii

Good afternoon, colleagues. The following situation has arisen. It is necessary to implement a modular application in Yii. Initial modules - catalog, magazine. Each of these modules must have front & back parts. The following module scheme is drawn in my head, with modules stacked:
frontend/catalog
frontend/magazine
backend/catalog
backend/magazine
What are the pros and cons of such a scheme?:
catalog/frontend
catalog/backend
magazine/frontend
magazine/backend
Other modules will appear in the future eg API. It doesn't need a backend. The modules will interact with each other, for example, articles from the journal will be mentioned in the catalog. Help organize the structure correctly. Thank you!

Answer 1

As an option, make the catalog module inside it two additional frontend and backend modules, also consider a system of controllers for inheriting the frontend and backend, which in turn will be inherited from one common one, I also use a gadget in my projects that allows you to store routing rules in the modules themselves that eliminates confusion

Answer 2

Isn't it easier to make modules without nesting?
catalogfrontend
catalogbackend
magazinefrontend
magazinebackend

Answer 3

Nested modules are too much for me. Better divided by applications: www.yiiframework.com/wiki/33/organize-directories-...