The SplDoublyLinkedList::bottom() function is an inbuilt function in PHP which is used to peek the value of node from the beginning of the doubly linked list.
Syntax:
mixed SplDoublyLinkedList::bottom( void )
Parameters: It does not accepts any parameter.
Return Value: It returns the value of first node in doubly linked list.
Below programs illustrate the SplDoublyLinkedList::bottom() function in PHP:
Program 1:
<?php   // Declare an empty SplDoublyLinkedList $list = new \SplDoublyLinkedList;   // Use SplDoublyLinkedList::push() function to // add elements to the SplDoublyLinkedList $list->push(1); $list->push(2); $list->push(3); $list->push(8); $list->push(5);   // Use bottom() function $val = $list->bottom();   // Display result print_r($val);   ?> |
Output:
1
Program 2:
<?php   // Declare an empty SplDoublyLinkedList $list = new \SplDoublyLinkedList;   // Use SplDoublyLinkedList::add() function to // add elements to the SplDoublyLinkedList $list->add(0, 30); $list->add(1, 20); $list->add(2, 30); $list->add(3, "Geeks"); $list->add(4, 'G');   // Use bottom() function $val = $list->bottom();   // Display result print_r($val);   ?> |
Output:
30
Reference: https://www.php.net/manual/en/spldoublylinkedlist.bottom.php
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