public function fieldFilterValuePhotos($object)
{
    global $conf;

    $photos = [];
    $dir = $conf->product->dir_output . '/' . $object->ref;

    if (!is_dir($dir)) {
        return $photos;
    }

    $files = scandir($dir);
    foreach ($files as $file) {
        if (preg_match('/\.(jpg|jpeg|png|gif)$/i', $file)) {
            $path = $dir . '/' . $file;
            $type = pathinfo($path, PATHINFO_EXTENSION);
            $content = file_get_contents($path);

            $photos[] = [
                'name' => $file,
                'src' => 'data:image/' . $type . ';base64,' . base64_encode($content)
            ];
        }
    }

    return $photos;
}