PHP Tree Graph: Render graphical diagrams of hierarchical trees

/**
 * phpTreeGraph
 *
 *
 * PHP version 5
 * @copyright  Mathias Herrmann 2007
 * @author     Mathias Herrmann <mathias_herrmann@arcor.de>
 * @license    GPL
  *                                                                          *
  * This PHP class is free software; you can redistribute it and/or          *
  * modify it under the terms of the GNU Lesser General Public               *
  * License as published by the Free Software Foundation; either             *
  * version 2.1 of the License, or (at your option) any later version.       *
  *                                                                          *
  * This PHP class is distributed in the hope that it will be useful,        *
  * but WITHOUT ANY WARRANTY; without even the implied warranty of           *
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU         *
  * Lesser General Public License for more details.                          *
  *                                                                          *
  *                                                                          *
  *                                                                          *
  *
 */

Documentation

Please take a look at the examples (Demo1.php, Demo2.php) to see the possibilities
of phptreeGraph.

Class documentation is in /doc

Classes:
------------------------------------------------------------------------------------

Tree.php - main class
contains the layout algorithm (walker algorithm) for calculating the node positions.

GDRenderer.php 
contains functions to draw the graph

Node.php
contains the Node class