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?>