SplDoublyLinkedList::isEmpty

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

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

說明

public SplDoublyLinkedList::isEmpty(): bool

參數(shù)

此函數(shù)沒有參數(shù)。

返回值

Returns whether the doubly linked list is empty.