SplDoublyLinkedList::bottom

(PHP 5 >= 5.3.0, PHP 7)

SplDoublyLinkedList::bottom — Peeks at the node from the beginning of the doubly linked list

public mixed SplDoublyLinkedList::bottom ( void )

此函数没有参数。

The value of the first node.

Throws RuntimeException when the data-structure is empty.