zendframework/zf2 — pull request #4272 by pdobrigkeit (2013-04-19 12:46:06+00:00)
Title: Added Option to customize the .dat file extension

Setting an '' empty string might lead to trouble, because the getIterator function would return the .tag files as well

I wanted to be able to use the Filesystem cache to write files that can be the same as an original file (i.e. create static .html files) that will be accessed later bypassing ZF2 completly, so I made the file extension of Cache customizable via the config option.