PHP Manual
SplDoublyLinkedList
Checks whether the doubly linked list is empty

SplDoublyLinkedList::isEmpty

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

SplDoublyLinkedList::isEmpty — Checks whether the doubly linked list is empty

说明

public SplDoublyLinkedList::isEmpty(): bool

参数

此函数没有参数。

返回值

Returns whether the doubly linked list is empty.