Datastructures
SplDoublyLinkedList::add
Datastructures
PHP Manual

# The SplDoublyLinkedList class

(PHP 5 >= 5.3.0)

## Introduction

The SplDoublyLinkedList class provides the main functionalities of a doubly linked list.

## Class synopsis

SplDoublyLinkedList implements Iterator , ArrayAccess , Countable {
/* Methods */
public __construct ( void )
public void add ( mixed `$index` , mixed `$newval` )
public mixed bottom ( void )
public int count ( void )
public mixed current ( void )
public int getIteratorMode ( void )
public bool isEmpty ( void )
public mixed key ( void )
public void next ( void )
public bool offsetExists ( mixed `$index` )
public mixed offsetGet ( mixed `$index` )
public void offsetSet ( mixed `$index` , mixed `$newval` )
public void offsetUnset ( mixed `$index` )
public mixed pop ( void )
public void prev ( void )
public void push ( mixed `$value` )
public void rewind ( void )
public string serialize ( void )
public void setIteratorMode ( int `$mode` )
public mixed shift ( void )
public mixed top ( void )
public void unserialize ( string `$serialized` )
public void unshift ( mixed `$value` )
public bool valid ( void )
}

## Table of Contents

- SplDoublyLinkedList::add — Add/insert a new value at the specified index
- SplDoublyLinkedList::bottom — Peeks at the node from the beginning of the doubly linked list
- SplDoublyLinkedList::__construct — Constructs a new doubly linked list
- SplDoublyLinkedList::count — Counts the number of elements in the doubly linked list.
- SplDoublyLinkedList::current — Return current array entry
- SplDoublyLinkedList::getIteratorMode — Returns the mode of iteration
- SplDoublyLinkedList::isEmpty — Checks whether the doubly linked list is empty.
- SplDoublyLinkedList::key — Return current node index
- SplDoublyLinkedList::next — Move to next entry
- SplDoublyLinkedList::offsetExists — Returns whether the requested $index exists
- SplDoublyLinkedList::offsetGet — Returns the value at the specified $index
- SplDoublyLinkedList::offsetSet — Sets the value at the specified $index to $newval
- SplDoublyLinkedList::offsetUnset — Unsets the value at the specified $index
- SplDoublyLinkedList::pop — Pops a node from the end of the doubly linked list
- SplDoublyLinkedList::prev — Move to previous entry
- SplDoublyLinkedList::push — Pushes an element at the end of the doubly linked list
- SplDoublyLinkedList::rewind — Rewind iterator back to the start
- SplDoublyLinkedList::serialize — Serializes the storage
- SplDoublyLinkedList::setIteratorMode — Sets the mode of iteration
- SplDoublyLinkedList::shift — Shifts a node from the beginning of the doubly linked list
- SplDoublyLinkedList::top — Peeks at the node from the end of the doubly linked list
- SplDoublyLinkedList::unserialize — Unserializes the storage
- SplDoublyLinkedList::unshift — Prepends the doubly linked list with an element
- SplDoublyLinkedList::valid — Check whether the doubly linked list contains more nodes

Datastructures
SplDoublyLinkedList::add
Datastructures
PHP Manual