by SourceGuardian.com SourceGuardian is the only serious choice for protecting and encrypting your PHP source code assets. With flexibility that other products only dream of Professional developers everywhere are using SourceGuardian products to distribute their scripts.
by phpSHIELD.com phpSHIELD protects your PHP Source Code with a powerful, easy to use encoder, which creates a native bytecode version of the script and then encrypts it.
by RS Software Lab The PHTML Encoder allows encoding PHP scripts before distributing them. The script code is encrypted before saving. Lock your scripts to a predefined machine via machine ID. Combine protected/unprotected scripts in one site.
by phpCipher PHP Encoder is a powerful application developed by phpCipher to protect your source code. This software will encrpyt php source code using phpCipher's online encoder.