Validate .htaccess-files with PHP.
The idea behind this script is to allow changing the .htaccess over the website (e.g. CMS) without losing control over the server. If you made a typo or an error, the server is sending a "Internal server error" (500) and you cannot correct the .htaccess over the website anymore! This script will automatically write the old content back, if you are producing an internal server error. So you will be safe.
Do not lose control anymore! :-)
Aurel 'dipser' Hermand