One great feature in phpStorm 8 was the ability to click on a function call and going to where that function is defined in the code. Makes tracking things down a lot easier, especially if you’re working on someone else’s code.
But in phpStorm 9 they took this functionality one step further. Now when you click on a function definition you can see everywhere in your project that it’s used.
This is a huge game-changer in identifying functions that aren’t used in your got any more. Or if you need to refactor a function you can make sure you’re not missing any calls to it.
The usages view looks like a popup view of the find in path functionality, and you can pin the results so you can go through them all, just like find in path.