IP restriction to the application in YII -- allow accessing the application to particular systems only

All the application actions are defined in site controller. So to restrict application we are modifying the site controller as follows. The added lines are marked with these font format:


use yii\filters\AccessControl;


class SiteController extends Controller
{
/**
* Declares class-based actions.
*/


public function actions()
{
return array(
// captcha action renders the CAPTCHA image displayed on the contact page
/*'captcha'=>array(
               'class'=>'CaptchaExtendedAction',
               // if needed, modify settings
               'mode'=>CaptchaExtendedAction::MODE_DEFAULT,
           ),*/
  'captcha'=>array(
                'class'=>'CCaptchaAction',
                'backColor'=>0xFFFFFF,
            ),
// page action renders "static" pages stored under 'protected/views/site/pages'
// They can be accessed via: index.php?r=site/page&view=FileName
'page'=>array(
'class'=>'CViewAction',
),
);
}
public function filters()
{
    return array(
        'accessControl',
    );
}

public function accessRules()
{
    return array(
array('allow',
'actions'=>array('captcha'),
'users'=>array('*'),
  ),
            array('allow',  // allow all users to perform only 'login' action
  'actions' => array('login','index', 'contact', 'error', 'logout'),
        //  'ips' => array('10.160.137.10','10.160.137.5'), uncomment this to specify IP restriction
        ),
        array('allow', // allow admin user to perform 'admin' AND 'delete' AND 'index' actions
   
           'users'=>array('admin'),
        ),
        array('deny',  // deny all users
        //    'ips'=>array('*'),
        ),
    );
}

   ............................................................. //  Rest of the code is as it is dont change anything
   .............................................................
}