Location: PHPKode > scripts > Singly Linked List > singly-linked-list/linkedlist.php
<?php

/**
 * LinkedList is a singly-linked list which contains a pointer to the next node
 * in the List and the data stored in the current node.
 * @version 1.0 - 2007-01-22
 * @author Allan Bogh - hide@address.com
 * @license - BSD - License provided below.
 */
class LinkedList{
	/**
	 * Generic constructor.
	 */
	function LinkedList(){
		$this->nextNode = NULL;
		$this->data = NULL;
	}
	
	/**
	 * addData places data into this node.
	 * @param $data - The data to be stored
	 */
	function addData($data){
		$this->data = $data;
	}
	
	/**
	 * setNext creates the next node with the data provided.
	 * @param $nextData - The data for the next list node.
	 */
	function setNext($nextData){
		$this->nextNode = new LinkedList();
		$this->nextNode->addData($nextData);
	}
	
	/**
	 * setEmptyNext creates the next node but does not
	 * instantiate any data. Another method must be implemented 
	 * to place data in the next node.
	 */
	function setEmptyNext(){
		$this->nextNode = new LinkedList();
	}
	
	/**
	 * getNext returns the next node in the linked list.
	 * @return The next node in the linked list.
	 */
	function getNext(){
		return $this->nextNode;
	}
	
	/**
	 * getData returns the data from the current node.
	 * @return The data contained in this node.
	 */
	function getData(){
		return $this->data;
	}
}

/* LICENSE

Copyright (c) 2007, Allan Bogh
All rights reserved.

Redistribution and use in source and binary forms, with or without modification, 
are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice, 
	this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright notice, 
	this list of conditions and the following disclaimer in the documentation 
	and/or other materials provided with the distribution.
    * Neither the name of the <ORGANIZATION> nor the names of its contributors
	 may be used to endorse or promote products derived from this software 
	 without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 
OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY 
WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*/
?>
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