I'm trying to have PHP session variables persist between sub domains (specifically www. and non-www), and I've looked all over the web. I've found two common answers, however they are not working for me. I've placed ini_set('session.cookie_domain', '.mysite.com'); in my login, index, and all includes pages - yet the session variable will not persist between www.mysite.com/index.php and mysite.com/index.php. I've also placed session.cookie_domain = .swimutopia.com; in the php.ini that is in the root folder for all these files. Yet, no solution! Can anyone help me? Please and thank you =)