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(PHP 5 >= 5.3.0, PHP 7, PHP 8)
RecursiveTreeIterator::__construct — Construct a RecursiveTreeIterator
$iterator,$flags = RecursiveTreeIterator::BYPASS_KEY,$cachingIteratorFlags = CachingIterator::CATCH_GET_CHILD,$mode = RecursiveTreeIterator::SELF_FIRSTConstructs a new RecursiveTreeIterator from the supplied recursive iterator.
本函数还未编写文档，仅有参数列表。
iterator
The RecursiveIterator or IteratorAggregate to iterate over.
flags
Flags may be provided which will affect the behavior of some methods. A list of the flags can found under RecursiveTreeIterator predefined constants.
caching_it_flags
Flags to affect the behavior of the RecursiveCachingIterator used internally.
mode
Flags to affect the behavior of the RecursiveIteratorIterator used internally.
