ArrayIterator::key

(PHP 5, PHP 7, PHP 8)

ArrayIterator::keyReturn current array key

Description

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

This function returns the current array key

Parameters

This function has no parameters.

Return Values

The current array key.

Examples

Example #1 ArrayIterator::key() example

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

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

echo 
$iterator->key(); //key
?>