logout facebook connect session
问题 I'm trying to integrate my site with facebook connection to handle facebook signup and facebook login. i'm using codeigniter framework. But I got this problem now: current facebook login user is "test1". I go to my site to sign up with facebook, everything works fine and "test1"'s info are stored in my database. However, after I log test1 out from facebook, and login "test2" in on facebook, I go back to my site and do a signup with facebook again, it still "test1"'s info stored. I use ion