How to implement authorization in Yii?

@mac 

To implement authorization in Yii, you need to follow these steps:

1. Define authentication and authorization components: In config/web.php file, define the authentication and authorization components that are required:

'components' => [ ... 'user' => [ 'identityClass' => 'appmodelsUser', 'enableAutoLogin' => true, ], 'authManager' => [ 'class' => 'yii bacDbManager', ], ... ],

1. Create roles and permissions: Use Yii's RBAC (Role-Based Access Control) to create roles and permissions that define who can access which action.
2. Assign roles and permissions to users: In your controller, you can assign roles and permissions to users using Yii's authorization methods:

use Yii; use yiiwebController;

class SiteController extends Controller { public function actionIndex() { $user = Yii::$app->user->identity;

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    // Check if the user has the "admin" role
    if (Yii::$app->authManager->checkAccess($user->id, 'admin')) {
        echo "You have admin rights!";
    }
    // Check if the user has the "updatePost" permission
    if (Yii::$app->authManager->checkAccess($user->id, 'updatePost')) {
        echo "You can update posts!";
    }
}

}

1. Restrict access to actions: You can restrict access to specific actions using access rules in the controller. For example:

use yiiiltersAccessControl;

class PostController extends Controller { public function behaviors() { return [ 'access' => [ 'class' => AccessControl::className(), 'rules' => [ [ 'actions' => ['create', 'update'], 'allow' => true, 'roles' => ['editor'], ], [ 'actions' => ['delete'], 'allow' => true, 'roles' => ['admin'], ], ], ], ]; } }

This code restricts the "create" and "update" actions to users with the "editor" role, and the "delete" action to users with the "admin" role.

1. Verify access in views: You can also verify access in views using the following code:

use Yii;

if (Yii::$app->user->can('updatePost', ['post' => $post])) { echo Html::a('Update Post', ['post/update', 'id' => $post->id]); }

This code checks if the current user has the "updatePost" permission for a specific post and displays the "Update Post" link accordingly.