Caching forever until the file has been edited by the backend

[eluser]CroNiX[/eluser]
In addition to what Otemu suggested, which is what I do, after something is saved in the backend and the cache file deleted, I issue a file_get_contents(url) so that the cache gets rebuilt by hitting the url at that time instead of the next time someone visits the page (so it's always cached for visitors).