(PHP 5 >= 5.3.0, PHP 7, PHP 8)
SplDoublyLinkedList::bottom — Peeks at the node from the beginning of the doubly linked list
Bu işlevin bağımsız değişkeni yoktur.
The value of the first node.
Throws RuntimeException when the data-structure is empty.
A note on top() and bottom():Picture the doubly-linked list (or queue) in the same way that you would a stack.Say you started with an empty queue, and added five values:$myList = new SplDoublyLinkedList$mylist->push(1)$mylist->push(2)$mylist->push(3)$mylist->push(4)$mylist->push(5)$mylist->top()-> 5$mylist->bottom()-> 1<?php/* * Examples of DoublyLinkedList */$obj = new SplDoublyLinkedList();// Check wither linked list is emptyif ($obj->isEmpty()){ echo "Adding nodes to Linked List<br>"; $obj->push(2); $obj->push(3); echo "Adding the node at beginning of doubly linked list <br>"; $obj->unshift(10);}echo "<br>Our Linked List:";print_r($obj);echo "<br>Pick the node from beginning of doubly linked list";echo $obj->bottom();?>