Detecting authenticated username in PHP

Hope someone can help.

I've got an internal website running on Linux (Ubuntu),Apache 2, MySQL 4.x, PHP4.x that is using to do user authentication from an Active Directory LDAP server.

See for my recent post on this.

My question is this - how can I pick up the authenticated username in a PHP4 script? Must I make some changes to Apache, or PHP? Must I use some PHP module?

Can anyone help?
Many thanks,

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Regardless, REMOTE_USER can be used to identify the externally-authenticated user. So, you can use $_SERVER['REMOTE_USER'].

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bcopsAuthor Commented:
Hi hernst42,

Many thanks for this. This seemed to work perfectly. One follow up question - do you know how long the session lasts for? Or where one can control that kind of information? Is it an apache setting?

Thanks Ben.

No its a thing of the browser which send the user-id and password until the browser is closed to the same pages and directory below the fist auth-page. So there is no session for the external user-authentication.
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