yii对cookie的操作常见的主要有以下几种：

1.设置cookie:

$cookie = new CHttpCookie("mycookie","this is my cookie"); 
$cookie->expire = time()+60*60*24*30; //有限期30天 
Yii::app()->request->cookies["mycookie"]=$cookie;

2.读取cookie:

$cookie = Yii::app()->request->getCookies(); 
echo $cookie["mycookie"]->value;

3.销毁cookie:

$cookie = Yii::app()->request->getCookies(); 
unset($cookie[$name]);