PHP | SplDoublyLinkedList count() function
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 elementsprint_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);$list->push(5); // Use SplDoublyLinkedList::count() function// to return number of elementsprint_r($list->count()); ?> |
Output:
5
Reference: https://www.php.net/manual/en/spldoublylinkedlist.count.php
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