Hello, i have ipcam and i try to check when is online or offline, but always i get of

[alexgr2006]

Hello, i have ipcam and i try to check when is online or offline, but always i get offline message. i use the follow code.
Please can u help if i have something wrong.

$ip="XXXX"; //DNS Cam
$port=XXXX;//Cam port
 
function getStatus($ip,$port)
{
  $socket = @fsockopen($ip, $port, $errorNo, $errorStr, 3);
   if(!$socket) return "offline";
 
   else    return "online";
}
 
echo getStatus($ip , $port);