public static function clear()
  {
    if (self::$enabled) {
      $f = new File(self::$logFilePath, true);
      $f->write('', false);
    }
  }
public static function clear()
  {
    if (self::$enabled) {
      $f = new File(self::$logFilePath, true);
      $f->write('', false);
    }
  }
éinitialise le fichier de logs