This class can used to generate license style keys to control the distribution and functionality of PHP applications.
It generates license strings that can bind PHP applications to specific domains, specific servers, can only be executed during limited time period, or to restrictions placed on a home server within the license key.
The binding to server process attempts to use the server network card MAC address. This feature was tested on servers are Mac OS X (Darwin), Linux, Windows XP, although it may also work for FreeBSD, NetBSD, Solaris.
PADL also attempts to use information from $_SERVER variable to encode that server name, server IP, server application path and server application url to the license key. Part of the process also binds the IP Address from the $_SERVER variable if found, but it also attempts to parse the server config file (the same used to get the MAC address) for any more IPs.
The server binding can be disabled if required, and it also possible to block the key being generated for the localhost address (127.0.0.1).
The time limiting of the license uses a start period (and a given start offset to allow for time discrepancies) and an expiry date if required.
If required when validating a key it is also possible to dial home to check the license key on your own PADL License Server, examples are given.
The PHP_OS and PHP_VERSION of the php that the key was generated for is also encrypted into the key.
It is also possible to encrypt additional information into the license key to enable you to place restrictive features in your application to allow the creation of trialware or demoware.
This class is still in development however it is stable. A GUI is to follow. |
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