(PHP 5, PHP 7)
再帰的なイテレータの反復処理に使用します。
$iterator
[, int $mode = RecursiveIteratorIterator::LEAVES_ONLY
[, int $flags = 0
]] )RecursiveIteratorIterator::LEAVES_ONLYRecursiveIteratorIterator::SELF_FIRSTRecursiveIteratorIterator::CHILD_FIRSTRecursiveIteratorIterator::CATCH_GET_CHILD