How to disable PHP OPCache for certain directories

Deactivate OPCache per folderIn this article, I want to show you how to disable the OPCache based caching for certain directories. (If you need a short introduction to the subject of OPCache, you should scroll down to the blue box in this article.) Although OPCache is a good idea in almost all cases, there are, as with many thing, situations where you should make an exception. Especially when it comes to the development or if a bugfix is to be tested, it can make sense to disable OPCache.
However, since other projects that benefit from OPCache are often running on the same web server, a complete deactivation of OPCache for such test cases can not be an option. Therefore, this article is about how to disable OPCache on the directory level.
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