public function getFileExtension ($name)
  {
    $fileType = $this->getFileType($name);

    if (!$fileType) {
        return '.bin';
    }

    // mimetype has been found... Let's look for the file-extension
    $mimeTypes = unserialize(file_get_contents(sfConfig::get('sf_symfony_data_dir').'/data/mime_types.dat'));
    $fileEx = isset($mimeTypes[$fileType]) ? '.'.$mimeTypes[$fileType] : '.bin';

    // Special treatment to avoid Firefox's bugs
    if($fileEx == ".bin") {
        $fileAr = explode('.', $this->getFileName($name));
        $fileEx = '.' . $fileAr[count($fileAr) - 1];
        if($fileEx == ".php" || $fileEx == ".pl" || $fileEx == ".php3" || $fileEx == ".php4" ||
                $fileEx == ".php5" || $fileEx == ".htaccess" || $fileEx == ".phtml") {
            return '.bin';
        }
    }

    return $fileEx;
  }