Subdomains and Logins

Question

If you multiple subdomains e.g.:

sub1.domain_name.com

sub2.domain_name.com

Is there a way to have a user be able to log into both

Answer 1

Yes. Just set the cookie on the domain ".domain_name.com" and the cookie will be available to sub1.domain_name.com, and sub2.domain_name.com.

As long as you maintain your session information on both domains, you should be fine.

This is a very common practice, and is why you can log into your Google Account at http://www.google.com/ and still be logged in at http://mail.google.com.