how to override Controller, Model, Views in yii2 - yii2

Question

How to override the class module in the config of my theme? I tried so impossible.
return [
...
'modules' => [
'shop' => [
'class' => 'app\modules\shop\ShopModule',
'components' => [
'manager' => [
'class' => 'app\web\theme\modules\shop\Customer',
],
],
],
...
],
];

Answer 1

Overriding controllers
Sometimes you may need to override default Yii2-user controllers. It is pretty easy and takes two steps.
Step 1: Create new controller
First of all you need to create new controller under your own namespace (we’d recommend app\controllers\user) and extend it from needed Yii2-user controller.
For example, if you want to override AdminController you should create app\controllers\user\AdminController and extend it from dektrium\user\controllers\AdminController:
<?php
namespace app\controllers\user;
use dektrium\user\controllers\AdminController as BaseAdminController;
class AdminController extends BaseAdminController
{
public function actionCreate()
{
// do your magic
}
}
Step 2: Add your controller to controller map
To let Yii2-user know about your controller you should add it to controller map as follows:
<?php return [
...
'modules' => [
...
'user' => [
'class' => 'dektrium\user\Module',
'controllerMap' => [
'admin' => 'app\controllers\user\AdminController'
],
...
],
...
],
For overriding view click here