(PHP 5 >= 5.3.0, PHP 7)
RecursiveTreeIterator::__construct — Construct a RecursiveTreeIterator
$it
[, int $flags = RecursiveTreeIterator::BYPASS_KEY
[, int $cit_flags = CachingIterator::CATCH_GET_CHILD
[, int $mode = RecursiveIteratorIterator::SELF_FIRST
]]] )Constructs a new RecursiveTreeIterator from the supplied recursive iterator.
本函数还未编写文档，仅有参数列表。
itThe RecursiveIterator or IteratorAggregate to iterate over.
flagsFlags may be provided which will affect the behavior of some methods. A list of the flags can found under RecursiveTreeIterator predefined constants.
caching_it_flagsFlags to affect the behavior of the RecursiveCachingIterator used internally.
modeFlags to affect the behavior of the RecursiveIteratorIterator used internally.
没有返回值。