free ADF.ly API service PHP script - make shortened URLs on the fly

The PHP script works with ADF.ly - advertising service - API.
It should help you to make shortened (advertised) urls in your projects and websites on-the-fly.
The script is very simple, well commented and it uses only 4 parameters, chose adfly's domain.
At first I wanted to sell it at codecanyon, but I decided to share it with all guys at ScriptMafia.org
Important: A basic knowledge of PHP is required.