Find Usages stopped working, always shows no results
I don't know what changed (I've never touched it in settings), but it just worked before and now it doesn't. As far as I know my project is as normal as any other, I haven't changed anything between when it did work and didn't.
http://imgur.com/kzmEi8k
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try invalidating caches (File/Invalidate caches, Restart) - does the problem persist?
That says it will invalidate Local History; is that the same as file change history? We use that as a fall-back just in case.
https://confluence.jetbrains.com/display/PhpStorm/Local+History+in+PhpStorm