APC, which is an acronym for Alternative PHP Cache, is a framework used for caching the compiled source code of a script app, which can speed up a database-driven Internet site several times. Each time a PHP webpage is opened, the script pulls the content that should be displayed from a database, parses and compiles the code, then the result is shown to the visitor. While this is necessary for sites with routinely changing content, it is a total waste of processing time and resources for an Internet site that does not change, like an informational portal that shows the exact same content on a regular basis. As soon as the pages for such an Internet site are compiled, APC caches them and delivers them each time a website visitor accesses them. As this saves the time to collect content from the database and to parse and compile the code, the website will load considerably quicker. APC is very efficient especially for scripts with larger source code.