spl_autoload_register(function($class)
{
    $class = explode('\\', $class);
    $class = array_pop($class);
    $pathApp            = 'application'.DS.$class.'.class.php';
    $pathControllers    = 'controllers'.DS.$class.'.class.php';
    $pathModels         = 'models'.DS.$class.'.class.php';

    if (file_exists($pathApp))
    {
        require_once($pathApp);
    }
    elseif (file_exists($pathControllers))
    {
        require_once($pathControllers);
    }
    elseif (file_exists($pathModels))
    {
        require_once($pathModels);
    }
});