Super Simple Cache: Cache the contents of remote Web pages

This class can cache the contents of remote Web pages.

It can check if a local cache for a given page URL exists.

If it exists and it was not created more than a cache maximum age period, the class returns the current cached data.

If the cache file does not exist or it has expired, the class retrieves the page from the given URL and stores its contents in the local cache file before returning the contents string.