Alternative PHP Cache, or APC, is a module for Apache web servers which is employed to cache the output code of script apps. It is very useful for scripts with large source code and will accelerate such a website up to three times. PHP websites are dynamic and each time a user opens some page, the script links to a database in order to get some content, and then the code is parsed and compiled prior to it being shown to the visitor. If the output code does not change however, that's the case with Internet sites that show the same content at all times, such actions result in needless reading and writing. What APC does is that it caches the already compiled program code and delivers it every time visitors browse a site, so the database does not have to be accessed and the program code doesn't have to be parsed and compiled repeatedly, which in turn lowers the Internet site loading time. The module could be quite efficient for informational websites, blogs, portfolios, and so on.