Package cache

This interface represents data which are stored automatically by the cache manager.

This exception is raised when you are asking a cache entry that doesn't exist.

This class manages cache. It makes a two-level lazy loading: <ul> <li>A top-level cache which avoids loading a data if it has already been done since the beginning of the current page generation. This cache has a short life span: it's flushed as of the PHP interpreter reaches the end of the page generation.</li> <li>A filesystem or shared RAM (via APC) cache to avoid querying the database every time to obtain the same value.