#### session組件
```
$session = \Yii::$app->session;
$session->isActiv); //判斷session是否開啟
$session->open() //開啟session
$session->set('name','jack'); //設置session
## $session->get('name'); //獲取session
$session->remove('name'); //刪除session
```
#### cookie組件
```
$cookie = \Yii::$app->response->cookies; //獲取cookie組件
$cookie_data = ['name'=>'name','value'=>'jack']; //設置cookie,name和value是固定寫法
$cookie->add(new Cookie($cookie_data)); //設置
$cookie_data = ['name'=>'name','value'=>'milan']; //修改
$cookie->add(new Cookie($cookie_data)); //修改
$cookie->remove('name') //刪除cookie
$cookies = \Yii::$app->request->cookies; //獲取請求cookie組件
$cookies->getValue('name','0'); //獲取cookie的值,不存在就默認值0
```
