PHP SplDoublyLinkedList pop() Function

PHP SplDoublyLinkedList isEmpty() Function

Last Updated : 23 Jun, 2023

The SplDoublyLinkedList::isEmpty() function is an inbuilt function in PHP which is used to check whether the doubly linked list is empty or not. Syntax:

bool SplDoublyLinkedList::isEmpty( void )

Parameters: This function does not accepts any parameters. Return Value: This function returns True if doubly linked list is empty, False otherwise. Below programs illustrate the SplDoublyLinkedList::isEmpty() function in PHP: Program 1:

php

<?php 

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

// Use isEmpty function 
$res = $list->isEmpty(); 

var_dump($res);

// 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 isEmpty function 
$res = $list->isEmpty(); 

var_dump($res);

?>

Output:

bool(true)
bool(false)

Program 2:

php

<?php 

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

// Use isEmpty function 
$res = $list->isEmpty(); 

var_dump($res);

// 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 isEmpty function 
$res = $list->isEmpty(); 

var_dump($res);

?>

Output:

bool(true)
bool(false)

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

PHP SplDoublyLinkedList pop() Function

jit_t

Improve

Article Tags :

Similar Reads

PHP SplDoublyLinkedList key() Function

The SplDoublyLinkedList::key() function is an inbuilt function in PHP which is used to return the index of the current node. Syntax: mixed SplDoublyLinkedList::key( void ) Parameters: This function does not accepts any parameters. Return Value: It returns the index of current node. Below programs il

PHP SplDoublyLinkedList next() Function

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 Sp

PHP SplDoublyLinkedList offsetGet() Function

The SplDoublyLinkedList::offsetGet() function is an inbuilt function in PHP which returns the value at given index. Syntax: mixed SplDoublyLinkedList::offsetGet( $index ) Parameters: This function accepts a single parameter $index which holds the index value. Return Value: It returns the value at gi

PHP SplDoublyLinkedList offsetSet() Function

The SplDoublyLinkedList::offsetSet() function is an inbuilt function in PHP which is used to set the value at given index. Syntax: void SplDoublyLinkedList::offsetSet( $index, $newval ) Parameters: This function accepts two parameters as mentioned above and described below: $index: It holds the inde

PHP SplDoublyLinkedList pop() Function

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 popp

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 d

PHP SplDoublyLinkedList offsetUnset() Function

The SplDoublyLinkedList::offsetUnset() function is an inbuilt function in PHP which is used to unset the value at given index. Syntax: void SplDoublyLinkedList::offsetUnset( $index ) Parameters: This function accepts a single parameter $index which holds the index value whose value to be unset. Retu

PHP SplDoublyLinkedList offsetExists() Function

The SplDoublyLinkedList::offsetExists() function is an inbuilt function in PHP which is used to check whether the given index exists or not. Syntax: bool SplDoublyLinkedList::offsetExists( $index ) Parameters: This function accepts a single parameter $index which holds the index value to be checked.

PHP SplDoublyLinkedList top() Function

The SplDoublyLinkedList::top() function is an inbuilt function in PHP which is used to return the value of last (top) node in a doubly-linked list. Syntax: mixed SplDoublyLinkedList::top( void ) Parameters: This function does not accepts any parameters. Return Value: It returns the value of last nod

PHP SplDoublyLinkedList prev() Function

The SplDoublyLinkedList::prev() function is an inbuilt function in PHP which is used to move to the previous entry. Syntax: void SplDoublyLinkedList::prev( void ) Parameters: This function does not accepts any parameters. Return Value: It does not return any value. Below programs illustrate the SplD