This script is broken and unmaintained.
Ad, Fly Away! is a relatively simple class to bypass adf.ly advertisements by fetching the page and parsing the destination URL from the source. It was written by Nathan Malcolm because there are better ways to make money than from services which pay $0.000000000000000000000001 per click.
An example of this class usage can be found at example/example.php. It is fairly documented but should be self explanatory.
Ad, Fly Away! is released under the WTFPLv2 license except as otherwise noted. http://sam.zoy.org/wtfpl/COPYING
A copy of this license is provided with the software (see LICENSE.txt).