Wildcard in URL (mod_alias or mod_rewrite)

I need to have URLs such as mydomain.com/whatever, where "whatever" can be any arbitrary string, all call the same php file where it sorts out what to display (or displays a 404). However, I want files and other php files to work normally (anything that is otherwise aliased, or that actually exists in the file system).

A simple AliasMatch /* myphpfile.php (after all the other Aliases in httpd.conf) works fine on my own setup, but on a production server, the wildcard alias sends all the other php files to myphpfile.php. I'm not sure what else might be confusing things.

Technically the whatever string will be alphabetic and lower case, so it can filter for that, but all attempts I've开发者_开发技巧 made with regex's haven't been successful.

Use these rules (you need mod_rewrite):

Options +FollowSymLinks -MultiViews
RewriteEngine On
RewriteBase /

# do not do anything for already existing files
RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule .+ - [L]

RewriteRule ([a-z]+) /myfile.php [L]

1. Place in .htaccess in website root folder. If placed elsewhere some tweaking may be required.

2. This will rewrite (internal redirect) all NON-EXISTING single-lowercase-word requests to /myfile.php, where using $_SERVER['REQUEST_URI'] script can determine which URL was called and decide what to do (routing).

3. This will work for URLs like /whatever, but will do nothing for /what-ever, /hello/pinky, /hello123.