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

i solved this probem use this code

session_name("name");
ini_set ("session.cookie_domain", '.domain.com') ;
session_set_cookie_params(0, '/', '.domain.com');
session_start();