Yii primary domain through a connection to the two-level domain name, two-level domain name on the login is unsuccessful

Yii primary domain is connected to level two domain by a, level two domain name is unsuccessful in login
Yii do a website, through a connected to the level two domain Name page, login not Yii::app ()->user->isguest the method to verify that the successful Yii domain name is not logged in

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------Solution--------------------
It's probably a cookie-scoped issue. Modify the Cookie.domain entry for the php.ini configuration file, such as your domain name is hello.com. So find this and change it into

Session.cookie_domain =. hello.com

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