PHP SplDoublyLinkedList pop() Function

PHP SplDoublyLinkedList shift() Function

Last Updated : 23 Jun, 2023

The SplDoublyLinkedList::shift() function is an inbuilt function in PHP which is used to shift the node from the beginning of the doubly linked list.

Syntax:

mixed SplDoublyLinkedList::shift( void )

Parameters: This function does not accepts any parameters.

Return Value: It returns the value of shifted node.

Below programs illustrate the SplDoublyLinkedList::shift() 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 shift() function 
var_dump($list->shift()); 
var_dump($list->shift()); 
var_dump($list->shift()); 
  
?>  

Output:

int(30)
int(20)
int(30)

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 shift() function 
var_dump($list->shift()); 
var_dump($list->shift()); 
var_dump($list->shift()); 
var_dump($list->shift()); 
  
?>  

Output:

int(1)
int(2)
int(3)
int(8)

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

PHP SplDoublyLinkedList pop() Function

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