PHP - Manual: SplDoublyLinkedList::key
2024-11-15
(PHP 5 >= 5.3.0, PHP 7, PHP 8)
SplDoublyLinkedList::key — Return current node index
This function returns the current node index
此函数没有参数。
The current node index.
官方地址:https://www.php.net/manual/en/spldoublylinkedlist.key.php