php Sessions not work well without www

Question

my sessions only work with a sub-domain, e.g. www. ,and do not work without that sub-domain.

For example, when a user is logged in.

If the address is n

Answer 1

If you want the php session to work all your subdomains, you must change cookie_domain option. Type this to top of your script:

ini_set('session.cookie_domain', '.example.com' );