TYPO3 Core

How about PSR-16 "Simple Cache"? It is much closer to our cache interfaces.

I understand your intention to make use of the doctrine cache implementations by introducing PSR-6, however I would prefer to make this an alternative to the current approach and change our implementation to PSR-16 instead. As far as I can see, doctrine does not make use of PSR-6 either, but uses an interface similar ours and PSR-16. Do you have an example of a successful PSR-6 implementation other than symfony?

http://symfony.com/doc/master/components/cache/psr6_psr16_adapters.html
http://blog.ircmaxell.com/2014/10/an-open-letter-to-php-fig.html
https://www.reddit.com/r/PHP/comments/3vu9dy/psr6_is_about_to_pass_and_still_has_serious/

See https://github.com/php-cache comes with adapters for Doctrine and PSR-16 caches. PSR-6 is simply the base.

Link no. one above is 404, Philipp.

I fixed the link.

The php-cache looks more promising than pure psr-6 interfaces. I still consider psr-6 a good example of "overengineering", but for the sake of interoperability, it might be worth adapting to it.

Much, much more details about the vision and strategy for this task:

https://gist.github.com/NamelessCoder/6519f8a0e05dbc4613de16c07bb63a6d