在线文档教程
PHP
SPL/Iterators

ArrayIterator::key

ArrayIterator::key

(PHP 5 >= 5.0.0, PHP 7)

ArrayIterator::key — Return current array key

Description

public mixed ArrayIterator::key ( void )

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 ?>

← ArrayIterator::getFlags

ArrayIterator::ksort →

© 1997–2017 The PHP Documentation Group

Licensed under the Creative Commons Attribution License v3.0 or later.

https://secure.php.net/manual/en/arrayiterator.key.php