Method getFileSize

public static function getFileSize($manager, $filename, $readable = 1)
{
    $path = PhocacartPath::getPath($manager);
    $fileNameAbs = Path::clean($path['orig_abs'] . '/' . $filename);
    if ($readable == 1) {
        return self::getFileSizeReadable(filesize($fileNameAbs));
    } else {
        return filesize($fileNameAbs);
    }
}