(PHP 5 >= 5.3.0, PHP 7, PHP 8)
RecursiveTreeIterator::beginIteration — Begin iteration
Called when iteration begins (after the first RecursiveTreeIterator::rewind() call).
本函數還未編寫(xiě)文檔，僅有參數列表。
此函數沒(méi)有參數。
A RecursiveIterator.