php-routing-sample/src/autoloader.php

<?php

class AutoLoader
{
    private static $loader;

    public static function loadClass($class)
    {
        self::$loader->loadClassInternal($class);
    }

    public static function registerLoader()
    {
        if (null !== self::$loader)
        {
            return self::$loader;
        }

        spl_autoload_register(array("AutoLoader", "loadClass"), true, true);

        self::$loader = new AutoLoader();
    }

    public function loadClassInternal($class)
    {
        require __DIR__ . "/lib/" . $class . ".php";
    }
}