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PHP SplDoublyLinkedList count() function

Last Updated : 23 Jun, 2023
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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 
<?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 
<?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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