Please document this method. I have found a use for it and would love to better understand how it works. TY : )
(PHP 5, PHP 7)
RecursiveIteratorIterator::getSubIterator — The current active sub iterator
이 함수는 현재 문서화 되어있지 않습니다; 인수 목록만을 제공합니다.
level
The current active sub iterator.