- PHP 手册
- 函数参考
- 其它基本扩展
- SPL
- 迭代器
- CachingIterator
CachingIterator::key
(PHP 5, PHP 7, PHP 8)
CachingIterator::key — Return the key for the current element
说明
public CachingIterator::key(): scalar 警告本函数还未编写文档，仅有参数列表。
This method may return a key for the current element.
参数
此函数没有参数。
User Contributed Notes
There are no user contributed notes for this page.官方地址：https://www.php.net/manual/en/cachingiterator.key.php