PHP read a cookie that is on another domain

Question

I have two domains. One domain contains the login script. It creates a cookie when logged in. Another domain have a URL shortener.

So, on the 2nd domain that have th

Answer 1

You can't read a cookie from the other domain.
though there are several ways to pass a session id. You can search SO for the cross-domain authorization

The easiest way is to pass a session id via query string