Getting blank value for $_SERVER['AUTH_USER']

Question

I have a PHP app running on Windows 2008 server R2, which authenticates users against Active Directory using PHP\'s LDAP library.

As per this answer, I\'m looking to use

Answer 1

I believe the correct index for the authenticated user is $_SERVER['REMOTE_USER'].

Answer 2

According to the PHP documentation, the correct index seems to be PHP_AUTH_USER.

Try using $_SERVER['PHP_AUTH_USER'].

Answer 3

I got it working by disabling Anonymous Authentication in IIS, and enabling Windows Authentication (I thought Windows Authentication was already enabled, but it turns out the role was simply installed.) Now $_SERVER['AUTH_USER'] and $_SERVER['REMOTE_USER'] are populated.