Using flash messages

When you are editing a model with a form, when you are deleting a model, or doing any other operation, it is good to tell users if it went well or if there was an error. Typically, after some kind of action, such as editing a form, a redirect will happen and we need to display a message on the page we want to go to. However, how do we pass it from the current page to the redirect target and clean up afterwards? Flash messages will help us.

Getting ready

Set up a new application using yiic webapp.

How to do it...

1. Let's create a protected/controllers/WebsiteController.php controller as follows:

   class WebsiteController extends CController
   {
      function actionOk()
      {
         Yii::app()->user->setFlash('success', 'Everything went fine!');
         $this->redirect('index');
      }
   
      function actionBad()
      {
         Yii::app()->user->setFlash('error', 'Everything went wrong!');
         $this->redirect('index');
      }
   
      function actionIndex()
      {
         $this->render...