Hi there , happy new year to all . Have a successful and prosperous new year . Coming to my query . I have two standalone yii application , i want to integrate both applications . Both are in the same domain . I had integrated both db too . Both application have its own authentication and authorisation systems. Now i want if users authenticate with first application they also authenticate to another. How to make a common authentication system ? What are the neccessary configuration i need to do in codes ? I am truely newbie . Please forgive my mistakes if any and please guide me how can i do my job ? I am lacking info so please guide me with neccessary stuffs . I know i get good guidance here .Thanks all .