How to protect your php applications for free ?

by Gabi Solomon

Did you developed a very cool application, and maybe thought about selling it ?
If you did you might have thought: How will i protect my code ?
Because the php code is visible and can be distributed really easy, once it has been downloaded once.

Well there are solutions to do this, but most of them are not free, and if your application is not a really expensive one it doesn’t make sense to pay more on the software to protect the code then the actual selling price.

Well you are in luck, because there is a php class called PADL (PHP Application Distribution License System) that generates PHP application license keys.

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 (

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.

This class received the Php Classes Innovation Award, and is ranked 98 in the same website, so this is why i highly recommend this class to protect your code.

Hope like this class as well,

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  • http://online.promoters.ro/ fulminant

    thanks… a nice start point…

  • http://www.eve-site.com Apocil Munar

    It Sucks No Documentation Provided, Not even Commented Sections in the code itself.

  • http://olimsaidov.id.uz/ Olim Saidov


  • http://www.mallxs.com/ kurti


  • vio

    without an obfuscation tool this is worthless. also the demo’s have allot of php warnings