Yii provides a concept of flash data. Flash data is a session data which −
- Is set in one request.
- Will only be available on the next request.
- Will be automatically deleted afterwards.
Step1 − Add an actionShowFlash method to the SiteController.
public function actionShowFlash() {
$session = Yii::$app->session;
// set a flash message named as "greeting"
$session->setFlash('greeting', 'Hello user!');
return $this->render('showflash');
}
Step2 − Inside the views/site folder, create a View file called showflash.php.
<?php
use yii\bootstrap\Alert;
echo Alert::widget([
'options' => ['class' => 'alert-info'],
'body' => Yii::$app->session->getFlash('greeting'),
]);
?>
Step3 − When you type http://localhost:8080/index.php?r=site/show-flash in the address bar of the web browser, you will see the following.
