Newbie - am wondering how to use PHP (?) to get the name of the user logged on to 'my' https:// site

Hello, I am a (relatively) newbie to PHP - and am wondering how to use PHP (?) to get the name of the user logged on to 'my' https:// site. IT set up the site via SSL and using active directory's users (i.e., IIS and Windoze...) for the logon. Every staff member can logon with their own Windoze network credentials, which is pretty slick as I let the network admin take care of permissions, passwords, etc through Windows Server. Web users with limited permissions have and can be added by IT as well, with my input on permission levels. Anyway... the user has the ability to write some stuff back to a PostgreSQL database and I would like to keep track of who is logged on that session so I can append their username into the "change log" of the database - *but how do I get the username?*" (Note that I could potentially see myself integrating (sic) Windows User Permissions for each user to differentiate their 'allowable' web page functionality - but that is in the medium to far future I think...) I have been exploring LDAP - but it seems like a hammer-and-walnut approach, at least to my untrained eye. I started looking at $_SESSION as well... that is enough to do your head in if you are not used to it, like I am not!   <grin> Any suggestions gratefully received! Cheers.... ---------- Regards, GREG COCKS GIS Analyst V Gcocks|at|stoller.com S. M. Stoller Corp 105 Technology Drive, Suite 190 Broomfield, CO 80021 www.stoller.com 303-546-4300 303-443-1408 fax 303-546-4422 direct 303-828-7576 cell