Zend Guard

Zend Guard is the leading solution for worry free distribution. With its key components of Encoding, Obfuscating and Licensing, Zend Guard protects your PHP applications from reverse engineering, unauthorized customization, unlicensed use and redistribution. Zend Guard helps you distribute your PHP applications securely while protecting your source code and intellectual property.
Product Benefits: Enables the protection and mass distribution of commercial PHP applications, Increases IP protection (against copyright infringement and reverse engineering) by distributing applications without revealing source code, Provides IT Managers with a solution that prohibits modification of their internal PHP application source code so they can effectively support them, Allows ISVs to impose a variety of licensing policies on commercial PHP applications, Vendors can increase their revenue by choosing from a variety of licensing models such as concurrent users, time limited, segment of network, or server specific.