şu sayfada örnek uygulama var 
http://www.4webhelp.net/scripts/php/uptime.php###########################################################################
#                                                                         #
# Copyright © 
http://www.4webhelp.net/                                    #
# Neither 
http://www.4webhelp.net/ nor its members accept any             #
# responsibility, either expressed or implied, for any damage caused by   #
# using this script or the misuse of this script.                         #
#                                                                         #
#                                                                         #
#                          INSTRUCTIONS                                   #
#                                                                         #
# 1) Copy this code to an editor such as Notepad and save it with a       #
# .php  extension.                                                        #
# 2) FTP this file to a folder on your site in ASCII mode                 #
# 3) Call up this file in your web browser to see your server's uptime    #
#                                                                         #
###########################################################################
  $data = shell_exec('uptime');
  $uptime = explode(' up ', $data);
  $uptime = explode(',', $uptime[1]);
  $uptime = $uptime[0].', '.$uptime[1];
  echo ('Current server uptime: '.$uptime.'
');
?>
This script courtesy of 4WebHelp.
Latest comments
Max
thanks guys
hehehe
here is mine for Windows Server 2003, tested and works just fine, its based on another comment here Smile
i had to download the uptime.exe from ms, just search for it on their site..
Uptime.php:
$server = $_POST['server'];
// only digits
$pattern = '/[^0-9]/';
?>
Uptime$uptime = `c:\windows\system32\uptime2.bat $server`;
$uptime = explode(": ", $uptime);
$uptime = explode(", ", $uptime[1]);
$uptime_days = preg_replace($pattern, '', $uptime[0]);
$uptime_hours = preg_replace($pattern, '', $uptime[1]);
$uptime_minutes = preg_replace($pattern, '', $uptime[2]);
$uptime_seconds = preg_replace($pattern, '', $uptime[3]);
echo '
Uptime:';
echo 'Days: '.$uptime_days.'
';
echo 'Hours: '.$uptime_hours.'
';
echo 'Minutes: '.$uptime_minutes.'
';
echo 'Seconds: '.$uptime_seconds.'
';
?>