文字
SplDoublyLinkedList::valid
(PHP 5 >= 5.3.0)
SplDoublyLinkedList::valid — Check whether the doubly linked list contains more nodes
说明
public bool SplDoublyLinkedList::valid
( void
)
Checks if the doubly linked list contains any more nodes.
参数
此函数没有参数。
返回值
Returns TRUE if the doubly linked list contains any more nodes, FALSE otherwise.