The steps to create a module in the Yii framework are as follows: 1. Create the module root directory and build the structure under the modules directory, including controllers, views and module class files; 2. Write module classes inherited from CWebModule as entry points; 3. Add controller and view files and ensure consistent naming; 4. Register modules in the main configuration file. The module structure must include controller, view and module classes. The module class needs to implement the init method. The controller and view are used to process requests and display pages. Finally, the module takes effect through configuration, pay attention to paths and naming specifications to avoid errors.

Creating a module (Module) is a common practice in the Yii framework for organizing large-scale project structures. If you want to separate functional modules, which are convenient for maintenance and division of labor development, Yii's module mechanism is very practical. Next, I will talk about how to operate it step by step.

1. Create a module directory structure

First, create a new folder in the modules directory as your module root directory. For example, if you want to create a module called admin , you can build the following structure under protected/modules/admin/ :

 admin/
├── controllers/
│ └── DefaultController.php
├── views/
│ └── default/
│ └── index.php
└── AdminModule.php

• controllers
• views put view files
• AdminModule.php is the main class of the module

2. Write module file

This class inherits from CWebModule and is the entry point of the module. For example, write in AdminModule.php :

 class AdminModule extends CWebModule
{
    public function init()
    {
        // You can configure the components of the module or the default controller, etc. parent::init();
    }
}

After this step is completed, the module has a basic structure.

3. Add controllers and views

Next you can add the controller. For example, create a DefaultController.php file:

 class DefaultController extends CController
{
    public function actionIndex()
    {
        $this->render('index');
    }
}

Then write some content in views/default/index.php for displaying the page. This way you can view the module homepage by visiting /index.php?r=admin/default/index .

4. Register the module in the main configuration

The last step is to register the module in protected/config/main.php to let Yii know that this module exists:

 return array(
    ...
    'modules'=>array(
        'admin', // This is the module name),
    ...
);

If you want to set alias, controller namespace, or other parameters for the module, you can also write it in an array form:

 'modules' => array(
    'admin' => array(
        'class' => 'application.modules.admin.AdminModule',
    ),
),

Tips: A few places that are easy to ignore

• The controller file name must be the same as the class name, such as PostController.php corresponds to PostController class.
• The module path must be correct, otherwise an error of not finding the class will occur.
• If you use your own layout file in a module, you can set $this->layoutPath in the module class.
• Controller names can be repeated between different modules because they are under different namespaces.

Basically these steps. Although modularity is not complex, it can significantly improve the maintainability of the project. As long as you pay attention to the directory structure and configuration order, you will generally not make any mistakes.

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