# RecursiveTreeIterator::__construct

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

RecursiveTreeIterator::__construct — Construct a RecursiveTreeIterator

### 说明

public RecursiveTreeIterator::__construct(
RecursiveIterator|IteratorAggregate `$iterator`,
int `$flags` = `RecursiveTreeIterator::BYPASS_KEY`,
int `$cachingIteratorFlags` = `CachingIterator::CATCH_GET_CHILD`,
int `$mode` = `RecursiveTreeIterator::SELF_FIRST`
)

Constructs a new RecursiveTreeIterator from the supplied recursive iterator.

警告

本函数还未编写文档，仅有参数列表。

### 参数

`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.

`↑` and `↓` to navigate • `Enter` to select • `Esc` to close • `/` to open