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