error_reporting(0);
 $browser        = strip_tags($_SERVER['HTTP_USER_AGENT']);
    $browser_tmp = ' '.strtoupper($browser);
    if ((strpos($browser_tmp, 'SELECT')) or
      (strpos($browser_tmp, 'DELETE')) or
      (strpos($browser_tmp, 'UPDATE')) or
      (strpos($browser_tmp, 'INSERT')) or
      (strpos($browser_tmp, ' FROM ')) or
      (strpos($browser_tmp, ' INTO ')) or
      (strpos($browser_tmp, 'VALUES'))
    ) {
      die('SQL-injection rejected.');
    }