Get children

# RecursiveIteratorIterator::callGetChildren

(PHP 5 >= 5.1.0, PHP 7, PHP 8)

RecursiveIteratorIterator::callGetChildren — Get children

### 说明

public function RecursiveIteratorIterator::callGetChildren(): ?RecursiveIterator

Get children of the current element.

### 参数

此函数没有参数。

### 返回值

A RecursiveIterator() on success, or `null` on failure.

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