ArrayIterator::key

(PHP 5, PHP 7)

ArrayIterator::keyReturn current array key

说明

public mixed ArrayIterator::key ( void )

This function returns the current array key

参数

此函数没有参数。

返回值

The current array key.

范例

Example #1 ArrayIterator::key() example

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

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

echo 
$iterator->key(); //key
?>

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