PHP SplDoublyLinkedList push() Function

The SplDoublyLinkedList::push() function is an inbuilt function in PHP which is used to push an element at the end of the doubly linked list.

Syntax:

void SplDoublyLinkedList::push( $value )

Parameters: This function accepts a single parameter $value which holds an element to push it at the end of doubly linked list.

Return Value: It does not return any value.

Below programs illustrate the SplDoublyLinkedList::push() function in PHP:

Program 1:

<?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);

// Display the elements of doubly linked list
var_dump($list);

?>

Output:

object(SplDoublyLinkedList)#1 (2) {
  ["flags":"SplDoublyLinkedList":private]=>
  int(0)
  ["dllist":"SplDoublyLinkedList":private]=>
  array(5) {
    [0]=>
    int(1)
    [1]=>
    int(2)
    [2]=>
    int(3)
    [3]=>
    int(8)
    [4]=>
    int(5)
  }
}

Program 2:

<?php

// Declare an empty SplDoublyLinkedList
$list = new \SplDoublyLinkedList();

// Use SplDoublyLinkedList::push() function to
// add elements to the SplDoublyLinkedList
$list->push("Welcome");
$list->push("to");
$list->push("GeeksforGeeks");
$list->push(5);

// Display the elements of doubly linked list
print_r($list);

?>

Output:

SplDoublyLinkedList Object
(
    [flags:SplDoublyLinkedList:private] => 0
    [dllist:SplDoublyLinkedList:private] => Array
        (
            [0] => Welcome
            [1] => to
            [2] => GeeksforGeeks
            [3] => 5
        )

)

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