PHP SplDoublyLinkedList pop() Function

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

Syntax:

mixed SplDoublyLinkedList::pop( void )

Parameters: This function does not accept any parameters.

Return Value: This function returns the value of a popped node in the doubly linked list. The below programs illustrate the SplDoublyLinkedList::pop() 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::pop() function 
// to remove elements from doubly linked list 
var_dump($list->pop()); 
var_dump($list->pop()); 
  
?>

Output:

string(1) "G"
string(5) "Geeks"

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::pop() function 
// to remove elements from doubly linked list 
var_dump($list->pop()); 
var_dump($list->pop()); 
var_dump($list->pop()); 
  
?>

Output:

int(5)
int(8)
int(3)

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

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