SplDoublyLinkedList::shift

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

SplDoublyLinkedList::shift — Shifts a node from the beginning of the doubly linked list

说明

public SplDoublyLinkedList::shift(): mixed

参数

此函数没有参数。

返回值

The value of the shifted node.

错误／异常

Throws RuntimeException when the data-structure is empty.