SplDoublyLinkedList::valid

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

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

說明

public SplDoublyLinkedList::valid(): bool

Checks if the doubly linked list contains any more nodes.

參數(shù)

此函數(shù)沒有參數(shù)。

返回值

Returns true if the doubly linked list contains any more nodes, false otherwise.