I am trying to drop extensions and enable access such that requests for "/", "/index", and "/index.ext" all return the same resource.
At the same time, I want every such resource to go through a PHP script that includes a header, footer, and does other processing before sending it back to the client as the resource they requested.
How do I do this using only .htaccess? Even with MultiViews off, I've hit a brick wall where every attempt results in an infinite rewrite loop.