Syntax:void SplDoublyLinkedList::prev (void)
Parameters:this function does not take any parameters.
Returned value:does not return any value.The programs below illustrate the
function SplDoublyLinkedList::prev() in PHP:
Program 1:
// Declare an empty SplDoublyLinkedList $list = new SplDoublyLinkedList;
// Use the SplDoublyLinkedList::add() function for
// add elements to SplDoublyLinkedList $list -> add (0, 30); $list -> add (1, 20); $list -> add (2, 30); $list -> add (3, " Geeks " ); $list -> add (4, ’ G’ );
// Use the SplDoublyLinkedList::prev() function
// to go to the previous post $list -> prev();
// Show doubly linked list print_r ( $list );
?> Exit:SplDoublyLinkedList Object ( [flags: SplDoublyLinkedList: private] = > 0 [dllist: SplDoublyLinkedList: private] = > Array ([0] = > 30 [1] = > 20 [2] = > 30 [3] = > Geeks [4] = > G))
Program 2:
// Declare an empty SplDoublyLinkedList $list = new SplDoublyLinkedList();
// Use the SplDoublyLinkedList::push() function for
// add elements to SplDoublyLinkedList $list -> push (1); $list -> push (2); $list -> push (3); $list -> push (8); $list -> push (5);
// Use the SplDoublyLinkedList::prev() function
// to go to the previous post $list -> prev();
// Show doubly linked list var_dump ( $list );
?> Exit:object (SplDoublyLinkedList ) # 1 (2) {["flags": "SplDoublyLinkedList": private] = > int (0) ["dllist": "SplDoublyLinkedList": private] = > array (5) {[0] = > int (1) [1] = > int (2) [2] = > int (3) [3] = > int (8) [4] = > int (5)}} Link: https://www.php.net/manual/en/spldoublylinkedlist.prev.php
