What do the folders and files highlighted in yellow mean in the phpstorm IDE document tree?

Question

PHP

Turned yellow after the composer uploaded libs there. I've never come across it, there are no hints in the IDE, so the question is actually ripe. Thank you in advance.

Answer 1

It's hard to say without a screenshot, but maybe it will tell you about what you are interested in: http://www.jetbrains.com/phpstorm/webhelp/file-status-highlights.html

Answer 2

Highlighting a file or folder means that there is an error or alert in the code. In your case, in the code, most likely, some tag is not closed or a file is loaded with an erroneous URL. If the file is highlighted in red, then there is a critical error in the code.