Sometimes you need to have access to the same session between multiple subdomains. Eg. a user logs in at the main website, but should also have access to the forums subdomain. Ideally you implement a check from the subdomain to the main domain, but this isn’t always possible. However, sharing a session between multiple domains is not possible.
It’s possible to set a cookie domain for your sessions. Instead of the default of
www.example.org cookie domain set it to
You can set the cookie domain, using session_set_cookie_params(). It needs to happen before the
eg. Put this at the top of your php pages that need to have shared sessions.
1 2 3 4 5 6 7 <?php session_set_cookie_params ( time() + 3600, // $lifetime '/', // $path '.example.org' ); session_start();