Yes, this is possible.  I did the exact thing your describing.  The only 
difference was that my PHP server was on Windows (but still a different box 
than the AD server).

See the LDAP functions in the PHP docs.  Everything you need is there.

Also, this article should get you started:
http://www.developer.com/lang/php/article.php/3100951

This thread pointed out some traps to be aware of.
http://forums.devshed.com/showthread.php?s=89cc8ab8717bd71121eb32b6e1457f38& 
t=74683&page=1&pp=15

Hope this helps,
Peter

At 02:10 PM 12/1/2004 , you wrote:

>Is it possible to authenticate to a WIN2K3 PDC from a PhP based webpage 
>running on Linux. Its for a Intranet site. Users should be able to use 
>their AD username/password and use the site, which will be using MySQL 
>database. Any ideas?? In the worst case, I can have the same 
>username/password built into the MySQL database and authenticate with the 
>database but I don't want to do that. It's a hassle.
>
>Thank you,
>Sanjay.

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