# RecursiveArrayIterator::getChildren

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

RecursiveArrayIterator::getChildren — Returns an iterator for the current entry if it is an array or an object

### 说明

public RecursiveArrayIterator::getChildren(): ?RecursiveArrayIterator

Returns an iterator for the current iterator entry.

### 参数

此函数没有参数。

### 返回值

An iterator for the current entry, if it is an array or object; or `null` on failure.

### 错误／异常

An InvalidArgumentException will be thrown if the current entry does not contain an array or an object.

### 示例

示例 #1 RecursiveArrayIterator::getChildren() example

`<?php
$fruits = array("a" => "lemon", "b" => "orange", array("a" => "apple", "p" => "pear"));
$iterator = new RecursiveArrayIterator($fruits);
while ($iterator->valid()) {
if ($iterator->hasChildren()) {
// print all children
foreach ($iterator->getChildren() as $key => $value) {
echo $key . ' : ' . $value . "\n";
}
} else {
echo "No children.\n";
}
$iterator->next();
}
?>`

以上示例会输出：

    No children.
    No children.
    a : apple
    p : pear

### 参见

- RecursiveArrayIterator::hasChildren() - Returns whether current entry is an array or an object

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