implement registration in backend

common/models/EventRegistration.php

@@ -3,6 +3,8 @@
 namespace common\models;
 
 use Yii;
+use yii\behaviors\TimestampBehavior;
+use yii\helpers\ArrayHelper;
 
 /**
  * This is the model class for table "event_registration".
@@ -50,4 +52,15 @@ class EventRegistration extends \yii\db\ActiveRecord
             'canceled_at' => Yii::t('event-registration', 'Canceled At'),
         ];
     }
+
+    public function behaviors()
+    {
+        return ArrayHelper::merge(  [
+            [
+                'class' => TimestampBehavior::className(),
+                'value' => function(){ return date('Y-m-d H:i:s' ); }
+            ]
+        ],
+            parent::behaviors());
+    }
 }