Package store

This interface represents a data store. Its different implementations store data in different physical areas, you have to use it according to the data's life span and the efficiency you need.

This data store is not already available, the APC PHP extension must be enabled for you yo use it.

This factory returns you the data store that are the best for your requirements.

This data store is not very efficient but is the only one which has an infinite life span when APC is not available.

This is a very efficient data store, but its principal weakness is that it's life span is very short, in fact it's the page's execution.