Php/docs/spldoublylinkedlist.valid

• PHP Manual
• SplDoublyLinkedList
• Check whether the doubly linked list contains more nodes

SplDoublyLinkedList::valid

(PHP 5 >= 5.3.0, PHP 7)

SplDoublyLinkedList::valid — Check whether the doubly linked list contains more nodes

说明

public SplDoublyLinkedList::valid ( ) : bool

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.