A class to generate and validate licenses for a domain, restricting an expire date.
PADL is a originaly written in 2005 by Oliver Lillie under older PHP4, parked o PHPCLASSES site. You can find the original code as part as this distribution or directelly in http://www.phpclasses.org/package/2298-PHP-Generate-PHP-application-license-keys.html .
You can see a quote about:
There are several solutions to help developers protecting the PHP software of applications that they want to sell.
Usually the developers provide license keys with their software that include information about the licensed code, enabled features, authorized configuration of the environment on which it is being installed.
This helps the developers to limit the scope of usage of their software according to the type of software license that their clients purchase.
This way the developers can use the same software distribution for different configurations and prices and even trial versions.
This class provides a means to generate license keys that include encrypted information about the clients PHP environment and even a way to send the keys to the developers site so they can capture the client features and generate upgraded keys that can enable more features for clients that pay the upgrade price.
Manuel Lemos (PHPCLASSES manteiner)
When I need to licence a PHP project, found this class and as it was so well written, it was very easy to update it to PHP 5.2 and 5.3.
You can find more about the original author in:
Otherwise a lot of modifications has been made, all core methods and examples are or just a copy or strongly based on the original project.
This versions are the same, but the loader are different and the 5.3 version uses namespaces.
There are some updates in the structure, class names and methods to remote validation to adapt to 2011 days.
A validator server is not yet implemented - code was not converted to PHP 5.2 and 5.3 - but in fact it could be done very easily with a webservice.