PHP 8.3.0 RC 6 available for testing

ArrayIterator::key

(PHP 5, PHP 7, PHP 8)

ArrayIterator::keyReturn current array key

说明

public ArrayIterator::key(): string|int|null

This function returns the current array key

参数

此函数没有参数。

返回值

The current array key.

示例

示例 #1 ArrayIterator::key() example

<?php
$array
= array('key' => 'value');

$arrayobject = new ArrayObject($array);
$iterator = $arrayobject->getIterator();

echo
$iterator->key(); //key
?>

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