I want a mod_rewrite rule set, so I can refer to a page without the .php extension, but have that rewritten to include the .php extension. This will be running on a 1&1 server.
Are there any good references so I can learn more myself?
RewriteEngine On
RewriteRule something something.php [L]
http://example.com/something
will be handled as if it was a request for something.php
To redirect all requests that are not a physical file to the same name but with .php:
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME}.php -f
RewriteRule (.*) $1.php [L]