Editable for only specific active directory user goup

Hi,

I'm trying to make a php message board on our company's Intranet that
can only be edited by a specific user group. The group "writers" is
managed in active directory.

Is it possible to automatically check if the user that is logged in to
windows and is watching the site is a part of the group "writers"? And
if that user is a part of writers then an "Edit" button would be
displayed on the site. The intranet site runs on Apache 2.2

Thanks!

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