Question

I’m programming with PHP.

I want to redirect https://abc.example.com/blah1/blah2 to https://www.example.com/blah1/blah2 but I don’t want to redirect https://abc.example.com redirect to https://www.example.com

Is it possible while preserving session information across the redirections?

Thank you.

Answer 1

You can continue using the redirects as you have them now, but adjust your session.cookie_domain to use the top-level domain (e.g. example.com). You can do this by using session_set_cookie_params or setting session.cookie_domain in your php.ini file (or in a .htaccess file after php_value directive). That should allow your session information to persist across all sub-domains of your site.