gistfile1.php

<?php

// TaskController - actionCreate
function actionCreate() {
...
$this->raiseEvent('onTaskCreate', new CEvent($this));
...
}

public function onTaskCreate($event) {
  echo '<pre>'; var_dump($event); echo '</pre>';
  $this->raiseEvent('onTaskCreate',$event);
  echo '<pre>'; var_dump($event); echo '</pre>'; die;
}

// NotificatioBehavior
class NotificationBehavior extends CBehavior{
 
    public function events(){
        return array(
        'onTaskCreate'=>'sendNotification',
        );
    }

    public function sendNotification($event){
        echo '<pre>'; var_dump($event); echo '</pre>'; die;
    }
 
}