Autoload.php

<?php
/*
 * This file is part of XRL, a simple XML-RPC Library for PHP.
 *
 * Copyright (c) 2012, XRL Team. All rights reserved.
 * XRL is licensed under the 3-clause BSD License.
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace fpoirotte\XRL;

class Autoload
{
    public static function load($class)
    {
        if (strpos($class, ':') !== false) {
            throw new \Exception('Possible remote execution attempt');
        }

        $class = ltrim($class, '\\');
        if (strncmp($class, 'fpoirotte\\XRL\\', 14)) {
            return false;
        }

        $class = substr($class, 14);
        $class = str_replace(array('_', '\\'), DIRECTORY_SEPARATOR, $class);
        if (!strncmp($class, 'tests\\', 6)) {
            $path = dirname(__DIR__);
        } else {
            $path = __DIR__;
        }
        require($path . DIRECTORY_SEPARATOR . $class . '.php');
        $res = (class_exists($class, false) || interface_exists($class, false));
        return $res;
    }

    public static function register()
    {
        static $registered = false;

        if (!$registered) {
            spl_autoload_register(array(__CLASS__, "load"));
        }
    }
}