Cache Master: Store and retrieve data in cache files

This class can store and retrieve data in cache files.

The class can store given data with a given key in cache file under a given cache directory. The cache directory is created if it does not exist.

The class stores the cache data in a file and the cache metadata in another file that holds the cache expiry time.

The class can also check if the cache file exists and retrieve the stored data, check if the cache file expired, or remove existing cache files.

What is the best PHP page caching class?
Need best caching to store XML documents