Provide array_filter_recursive in ArrayUtility
The php-function array_filter() can't iterate over nested arrays. To filter such arrays a recursive functionality would be useful.
This is intended to be used in another feature-issue. Maybe reviewing that function separately makes sense.
Upon trying to come up with an ideal solution, at the security code-sprint in Wiesbaden, it took quite some testing and research. But imho we found an ideal solution, which I'd like to propose for ArrayUtility.