<?php
  // change this, if this code isn't "higher" than ALL classfiles
  define("CLASS_DIR", dirname(__FILE__));
  
  /**
   * autoload classes (no need to include them one by one)
   *
   * @uses classFolder()
   * @param $className string
   */
  function __autoload($className)
  {
      $folder = classFolder($className);
  
      if ($folder)
          require_once($folder . $className . ".class.php");
  }
  
  /**
   * search for folders and subfolders with classes
   *
   * @param $className string
   * @param $sub string[optional]
   * @return string
   */
  function classFolder($className, $sub = "/")
  {
      $dir = dir(CLASS_DIR . $sub);
  
      if (file_exists(CLASS_DIR . $sub . $className . ".class.php"))
          return CLASS_DIR . $sub;
  
      while (false !== ($folder = $dir->read())) {
          if ($folder != "." && $folder != "..") {
              if (is_dir(CLASS_DIR . $sub . $folder)) {
                  $subFolder = classFolder($className, $sub . $folder . "/");
  
                  if ($subFolder)
                      return $subFolder;
              }
          }
      }
      $dir->close();
      return false;
  }
  
  spl_autoload_register('__autoload');