Apache’s mod_negotiation is available, at least on the server I’m on (gap). You may need the following line in .htaccess in the root directory of your site to use it:
(there should be a plus sign in front of Multiviews in the line above; this forum software is broken in that it strips them out for some reason)
Note that mod_negotiation has nothing to do with PHP. You may want to read the documentation for further clarification.
If you want useful replies, ask smart questions.