PHP. Использование итераторов директорий.

$directory = new \RecursiveDirectoryIterator('./datafiles');
$iterator = new \RecursiveIteratorIterator($directory);
$regex = new \RegexIterator($iterator, '/\w+\.ixt/i',
                \RecursiveRegexIterator::GET_MATCH);
$files = array();
foreach($regex as $file) {
    $files[] = $file[0];
}
sort($files);
print_r($files);

Array
(
    [0] => akjkdsjff3.ixt
    [1] => dfsd8878.ixt
    [2] => skka878.ixt
    [3] => zwsdf8sdk.ixt
)

Silex. Динамическая маршрутизация (роутинг).

Как вариант:

use Silex\Application;
use App\Controller;

$app = new Application();
$app->get('/{controller}/{action}',
    function($controller, $action) use ($app)
{  
    $controllerName = ucfirst($controller) . 'Controller';
    if(class_exists($controllerName)) {
        $controller = new $controllerName;
        if ($controller instanceof Controller) {  
            if(is_callable(array($controller, $action))) {  
                return $controller->$action($app);  
            }  
        }
    }
    $app->abort(  
        404,  
        sprintf(  
            'No route found for: %s:%s',  
            $controller,  
            $action  
        )  
    );  
})  
->assert('controller', '[A-z]+')  
->assert('action', '[A-z]+')
->value('controller', 'index')
->value('action', 'index');  
$app->run();

Автозагрузку классов делаем через composer

...
"autoload": {
    "psr-4": {"": ["model/", "controller/"] }
}
...

Контроллеры наследуем от супер-класса