In one of my pet projects, I redirect all requests to index.php, which then decides what to do with it:
Options +FollowSymlinks
RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule . index.php [L]
This snippet in your .htaccess will ensure that all requests for files and folders that does not exists will be redirected to index.php.
This enables the rewrite engine:
Options +FollowSymlinks
RewriteEngine on
This checks for existing folders (-d) and files (-f):
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
And this does the actual redirecting:
RewriteRule . index.php [L]
If it's not working, make sure that mod_rewrite is installed on Apache
