Zend Optimizer is a free tool for executing pre-compiled PHP code. The code must have been pre-compiled using Zend Guard for Zend Optimizer to be able to execute it. The advantage of pre-compiled code means that the code has already been slightly processed and is no longer human readable. The PHP code will also execute faster since it has already been pre-compiled.
Many web applications (such as content management systems) that can be purchased online may be pre-compiled using Zend Gaurd or other similar tools to prevent reverse engineering or tampering of the PHP code. To be able to install a web application that has been pre-compiled using Zend Gaurd, you will need to install Zend Optimizer in your web space before the code will execute properly.
Follow the steps below to download and install Zend Optimizer in order to execute Zend Guard protected files as if they were regular PHP scripts.