What are modules for?

Question

Yii

I would like to hear why to use modules and in what cases it is necessary to use modules?

Answer 1

Modular programming is the organization of a program as a collection of small independent blocks called modules, the structure and behavior of which obey certain rules.[1] The use of modular programming makes it easier to test the program and find errors. Hardware-dependent subtasks can be strictly separated from other subtasks, which improves the portability of the created programs.
A module is a functionally complete fragment of a program. In many languages ​​(but by no means necessarily) it is issued as a separate file with source code or a named continuous part of it. Some languages ​​provide for combining modules into packages.

reference
And means so and should be used. For example, a block of comments deserves to become a module. Because it only needs to know the IDs of the entities it is called on. Such a module can be used for anything. For example, comment on articles, photos, videos and all that stuff. Which in turn can also be separate modules =)

Answer 2

I think that the question here is not about the definition of modularity in general, but about modularity in the context of Yii.
In Yii, a module is a mini-application that has its own models, controllers, and views. A module cannot exist on its own, only in the context of an application. Modules inherit from yii\base\Module. An example of a module is the admin panel for the CMS.
Here it is well written about it
https://yiiframework.com.ua/en/doc/guide/2/structu...

Answer 3

rmcreative.ru/blog/post/moduli-yii