[ Thanks to tk421 for this link.
]
“PHP is well known as an open source scripting language. Though
PHP itself is open, that doesn’t necessarily mean that all PHP
developers want their code to open as well.“Zend, the lead commercial sponsor behind PHP, is set to release
a newly re-named tool in April that will help PHP developers
protect their code from prying eyes. Currently in Beta testing,
Zend Safeguard offers the promise of obfuscating source code as
well as providing license management capabilities that aim to make
PHP based application development and deployment more attractive to
ISVs…”