Autoloader.php

<?php
/**
 * Upload
 *
 * @author      Josh Lockhart <info@joshlockhart.com>
 * @copyright   2012 Josh Lockhart
 * @link        http://www.joshlockhart.com
 * @version     1.0.0
 *
 * MIT LICENSE
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
namespace Upload;

/**
 * Autoloader
 *
 * This class provides a default PSR-0 autoloader if not using Composer.
 *
 * @author  Josh Lockhart <info@joshlockhart.com>
 * @since   1.0.0
 * @package Upload
 */
class Autoloader
{
    /**
     * The project's base directory
     * @var string
     */
    static protected $base;

    /**
     * Register autoloader
     */
    static public function register()
    {
        self::$base = dirname(__FILE__) . '/../';
        spl_autoload_register(array(new self, 'autoload'));
    }

    /**
     * Autoload classname
     * @param  string $className The class to load
     */
    static public function autoload($className)
    {
        $className = ltrim($className, '\\');
        $fileName  = '';
        $namespace = '';
        if ($lastNsPos = strripos($className, '\\')) {
            $namespace = substr($className, 0, $lastNsPos);
            $className = substr($className, $lastNsPos + 1);
            $fileName  = str_replace('\\', DIRECTORY_SEPARATOR, $namespace) . DIRECTORY_SEPARATOR;
        }
        $fileName .= str_replace('_', DIRECTORY_SEPARATOR, $className) . '.php';
        require self::$base . $fileName;
    }
}