(PHP 5 >= 5.3.0, PHP 7)
SplHeap::rewind — Rewind iterator back to the start (no-op)
This rewinds the iterator to the beginning. This is a no-op for heaps as the iterator is virtual and in fact never moves from the top of the heap.
이 함수는 인수가 없습니다.
값을 반환하지 않습니다.