No programmer finds it funny when their source code is stolen from their websites in PHP, after so many hours of work and effort dedicated to getting it right. This is the reason they have created a program like PHP Locker.
With PHP Locker you have a tool that lets you code your PHP source code to make it totally incomprehensible and illegible. This way, if they steal it, they can`t use it.
In reality PHP Locker makes no changes to the PHP code, it simply mixes it up to make it unreadable. It works with both PHP4 and PHP5.