YII cookie managment

yii_cookie_managment.php

//set cookie
Yii::app()->request->cookies['cookie_name'] = new CHttpCookie('cookie_name', $value);

//get cookie
$cookie = Yii::app()->request->cookies['cookie_name']->value;
$cookie = (string)Yii::app()->request->cookies['cookie_name'];

//delete cookie
unset(Yii::app()->request->cookies['cookie_name']);

//clear all cookies
Yii::app()->request->cookies->clear();

//safe reading cookie
$value = Yii::app()->request->cookies->contains('cookie_name') ? Yii::app()->request->cookies['cookie_name']->value : '';