URL shortner

Hi guys,
none have idea about how use a URL shortner in a creator application? I need to reduce a large url using a webservice (as goo.gl) and send short url in sendmail with .qr suffix to produce a QR image.
I find here a function to shortify url and here Api documentation.
Here a site that have a source code that may be use.
Any suggestion?
THanks

Mic