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:
php
php
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:
Program 2:
1
<?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:
Reference: https://www.php.net/manual/en/spldoublylinkedlist.bottom.php30