Auto registration modules

Hi! I did automatic registration modules:

$modules = array();

foreach(array_diff(scandir(APP_DIR), array('..', '.')) as $dir)
{
    if(is_dir(APP_DIR.'/'.$dir))
    {
        $modules[$dir] = array(
            'className' => 'Cms\Module\\'.ucfirst($dir),
            'path' => '../modules/'.$dir.'/Module.php'
        );
    }
}

$application->registerModules($modules);

Is there a better solution?

What is the difference these two methods?

1.

$application->registerModules(
        array(
            'frontend' => array(
                'className' => 'Multiple\Frontend\Module',
                'path'      => '../apps/frontend/Module.php',
            ),
            'backend'  => array(
                'className' => 'Multiple\Backend\Module',
                'path'      => '../apps/backend/Module.php',
            )
        )
    );

2.

$application->registerModules(
    array(
        'frontend' => function($di) use ($view) {
            $di->setShared('view', function() use ($view) {
                $view->setViewsDir('../apps/frontend/views/');
                return $view;
            });
        },
        'backend' => function($di) use ($view) {
            $di->setShared('view', function() use ($view) {
                $view->setViewsDir('../apps/backend/views/');
                return $view;
            });
        }
    )
);