SourceGuardian for PHP is the ultimate protection solution for your PHP scripts.

Main feature list:

+ Full Bytecode Encryption - protect your files by removing the original PHP Source Code    
+ Fully encode and deploy for PHP5 (and PHP4)    
+ Choice of Windows/Linux/Mac OS X encoding clients    
+ Command line encoder available now    
+ Encrypt to domain name
+ Encrypt to IP
+ License generator for encoded scripts    
+ Easy to use Wizard interface and Advanced mode in GUI    
+ Automatic backup of source files    
+ Deployment options    
+ Lock to domain names, IP addresses or LAN hardware
+ Timeout your scripts at specific dates or days in the future
+ Encoded files run under Linux, FreeBSD, Windows, Mac OS X, Solaris, HP-UX
+ Require no changes to the standard web server installation    
+ Free minor updates    
+ Technical support

SourceGuardian for PHP is the most comprehesive and user-friendly protection solution on the market. A free 7-day trial is available