Save users last login datetime

protected/modules_core/user/components/UserIdentity.php

@@ -107,6 +107,10 @@ class UserIdentity extends CUserIdentity {
      * @param User $user
      */
     private function onSuccessfulAuthenticate($user) {
+        
+        $user->last_login = new CDbExpression('NOW()');
+        $user->save();
+        
         $this->_id = $user->id;
         $this->setState('title', $user->title);
     }

protected/modules_core/user/migrations/m140706_135210_lastlogin.php

@@ -0,0 +1,27 @@
+<?php
+
+class m140706_135210_lastlogin extends EDbMigration
+{
+
+    public function up()
+    {
+        $this->addColumn('user', 'last_login', 'DATETIME DEFAULT NULL');
+    }
+
+    public function down()
+    {
+        echo "m140706_135210_lastlogin does not support migration down.\n";
+        return false;
+    }
+
+    /*
+      // Use safeUp/safeDown to do migration with transaction
+      public function safeUp()
+      {
+      }
+
+      public function safeDown()
+      {
+      }
+     */
+}