The SplDoublyLinkedList::count() function is an inbuilt function in PHP which is used to count the number of elements present in a doubly linked list.
Syntax:
int SplDoublyLinkedList::count( void )
Parameters: It does not contain any parameter.
Return Value: It returns the number of elements present in doubly linked list.
Below programs illustrate the SplDoublyLinkedList::count() function in PHP:
Program 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"); $list->add(4, 'G');   // Use SplDoublyLinkedList::count() function // to return number of elements print_r($list->count());   ?> |
Output:
5
Program 2:
<?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); $list->push(5);   // Use SplDoublyLinkedList::count() function // to return number of elements print_r($list->count());   ?> |
Output:
5
Reference: https://www.php.net/manual/en/spldoublylinkedlist.count.php
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