PHP SplDoublyLinkedList count() function

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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  
  
// 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:

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:

Reference: https://www.php.net/manual/en/spldoublylinkedlist.count.php

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