Alternative PHP Cache, or APC, is a module for Apache web servers which is used to cache the output code of script apps. It is very useful for scripts with large source code and will boost such a website as much as 3 times. PHP websites are dynamic and each time a user accesses some page, the script connects to a database in order to retrieve some content, then the code is parsed and compiled prior to it being displayed to the guest. If the output code doesn't change however, that is the case with websites that show the very same content all of the time, these actions trigger unneeded reading and writing. What APC does is that it caches the already compiled program code and delivers it any time visitors browse an Internet site, so the database doesn't need to be accessed and the code doesn't have to be parsed and compiled over and over again, that consequently lowers the site loading time. The module can be rather effective for informational Internet sites, blogs, portfolios, and many others.