URL shortener by hycus: Create short URLs storing them in a MySQL database

This class can be used to create short URLs storing them in a MySQL database.

It can create a short key for an URL and store the key and URL association in a MySQL database table.

The class can also lookup for a given short URL key and redirect to the associated URL using HTTP redirection headers or HTML with JavaScript to redirect to the expanded URL page.

It can use mod_rewrite to redirect the access to the short URL to a script that uses this class to do the actual redirection.