PHP SplDoublyLinkedList next() Function

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The SplDoublyLinkedList::next() function is an inbuilt function in PHP which is used to move the index into next index.

Syntax:

void SplDoublyLinkedList::next( void )

Parameters: This function does not accept any parameter.

Return Value: It does not return any value.

Below programs illustrate the SplDoublyLinkedList::next() 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'); 
$list->rewind(); 
  
// Use SplDoublyLinkedList::current() function 
// to get the current element 
var_dump($list->current()); 
  
// Use next() function to increment 
// the index value 
$list->next(); 
  
// Use SplDoublyLinkedList::current() function 
// to get the current element 
var_dump($list->current()); 
  
?>  

Output:

int(30)
int(20)

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); 
  
$list->rewind(); 
  
// Use SplDoublyLinkedList::current() function 
// to get the current element 
var_dump($list->current()); 
  
// Use next() function to increment 
// the index value 
$list->next(); 
$list->next(); 
$list->next(); 
  
// Use SplDoublyLinkedList::current() function 
// to get the current element 
var_dump($list->current()); 
  
?>  