<?php  namespace app/controllers;  use yii/web/Controller;  class HelloController extends Controller{　　　　public function actionIndex(){    　　 //把session當做對象    　　 $session = /yii:$app->session;    　　if($session->isActive){      　　 echo "session isactive";    　　}else{      　　 $session->open();    　　}    　　$session->set("user","張三");    　　$session->get("user");    　　$session->remove("user");    　　 //把session當做數組      　　 $session['user'] = "張三";    　　 unset($session["user"]);　　　　}  }?>

<?php  namespace app/controllers;  use yii/web/Controller;  use yii/web/Cookie;  class HelloController extends Controller{    //存入cookie和修改cookie    $cookies = /YII::$app->response->cookies;        $cookie_data = array('name'=>"user","value"=>"zhangsan");    $cookies->add(new Cookie($cookie_data));//以'cookieValidationKey' 為基礎的加密字符串    $cookies->remove("id");//移除掉ID的cookie    //取出cookie的值    $cookies = /YII::$app->request->cookies;    $cookies->getValue("user");    //如果cookie不存在    $cookies->getValue("user",20);//返回20  }?>