PHTML Encoder PRO Multiplatform Description:

The PHTML Encoder PRO (ex-"PHP Encoder") allows to encode PHP scripts before distributing it. The script code saving with use cryptography. Because PHTML Encoder based on PHP source this software working on ALL computer and server platforms which support PHP. The PHTML Encoder includes converter for encryption/decryption of your scripts. It is possible to combine protected and unprotected scripts in one site.

This is PHTML Encoder PRO for Windows, Linux+PHTML Encoder source code.