YAPHPO (Yet Another PHP Obfuscator) is a PHP
obfuscator with a number of new, compelling
features. Some of these include obfuscation of
constants and a wildcard include / exclude
function to selectively obfuscate certain
variables, constants, classes, functions and / or
files (each type of item has its own list). It
also does step-by-step obfuscation whereby each
step is stored in a separate directory to help
visually ensure that the obfuscation process was
correct.