Numerous licensed and some cost-free script-driven applications have encoded program code, that isn't human readable. The concept behind this is to avoid the reverse engineering as well as the unwanted use of such applications. One of the most popular encryption instruments used for this purpose is named Zend Guard and it's widely used due to the fact that it can be used to modify any PHP 4, PHP 5, PHP 7 and PHP 8 code. The only way for the encoded files to run the right way on a web server subsequently is when a second instrument called Zend Optimizer is available. When you would like to work with any paid web software requiring Zend Optimizer, you need to ensure that it is set up on the server where you'll host your site. Furthermore, websites which require the instrument tend to perform better as their code is already precompiled and optimized, and therefore it's executed more quickly.