I have a list of URIs and one parameter $path.
I want to match URIs based on that $path. I want to get all files in $path + all index files from subdirectories but ONLY for the first child. So I don’t wanna get all index files from all subdirectories.

Example: $path = /root

/root/index.shtml           - MATCH ME (because file is in $path)
/root/root_one.shtml        - MATCH ME (because file is in $path)
/root/one/index.shtml       - MATCH ME (because im an index-child)
/root/two/index.shtml       - MATCH ME (because im an index-child)
/root/two/test.shtml        - DONT MATCH ME
/root/two/three/index.shtml - DONT MATCH ME
/root/2024/index.shtml      - MATCH ME (because im an index-child)
/root/2024/one.shtml        - DONT MATCH ME

At least based on my knowledge, I think I have to use two regex to match everything.

Match all files within directory: /news/[^/]+.shtml
Match all index.shtml on first childs: I have no idea.

So if someone could help me out. If you can do both in one regex, feel free to share.

Best regards.