cookie

$cookie = Yii::$app->request->cookies;
$cookie->get('cookie_name'); //返回一个\yii\web\Cookie 对象
$cookie->getValue('cookie_name'); //直接返回 Cookie 的值
$cookie[‘cookie_name’];//直接返回 Cookie 的值
 
$cookie->has(‘快乐的小飞侠’);   //判断一个 Cookie 是否存在
   
$cookie->count();//读取 Cookie 的总数
$cookie->getCount();//跟count() 一样

$cookie = new Cookie();
$cookie->name = $unionid;
$cookie->value = $result['data']['access_token'];
$cookie->expire = time() + $result['data']['expires_in'] - 3600;
$cookie->httpOnly = true; //无法通过 js 读取 cookie
yii::$app->response->cookies->add($cookie);