How to set a different file extension with a rewrite rule?If you need to refer to your files using an extension different from their default one, you can add this rewrite rule to your .htaccess file:
Options +FollowSymlinks
RewriteEngine On
RewriteBase /
RewriteRule ^(.+)\.bla$ /$1.php [NC,L]
This way you will be able to open your .php files with .bla extension. For example, you will be able to refer to index.php as index.bla.