ArrayIterator::key
(PHP 5, PHP 7, PHP 8)
ArrayIterator::key — Return 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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