IteratorIterator::key

(PHP 5 >= 5.1.0, PHP 7, PHP 8)

IteratorIterator::key — Get the key of the current element

說明

public IteratorIterator::key(): mixed

Get the key of the current element.

參數(shù)

此函數(shù)沒有參數(shù)。

返回值

The key of the current element.

參見