So I'm making a page for one of my web sites that scans the visitors ports (just a few specific ones, not ALL) and tells them if they have any open. Now I made up the code and it worked great. Now instead of having the same chunk of code all over my script, I tried to make my own subroutine so I could just call it from all over. But since I did that, it now gives me an error of type 0, which means it couldn't even try to connect to the host, before it got an error. I can't figure it out at all?

Here's my code
And here is how I call the function...
I'm new to writing php's, but I don't think I have any syntax problems?

OK, I am very much a beginer at PHP. It appears to work fine if you add quotes around the first argument (maybe because the fsockopen's first argument is a string? (anybody?)). Also slightly modifed your syntax. See below. On my PC, the output was: "Closed 9 " when trying port 22, but trying port 80, the output was "Open"

<? function sniff( $portnumber ) {
	$REMOTE_ADDR="localhost";
	$sock = fsockopen("$REMOTE_ADDR", $portnumber, $errno, $errstr, 80);
         if (!$sock)
             {
              if ($errno == 60)
                  {
                  echo "Timeout";
                  }
              else 
                  {
                  echo "Closed $errno";
                 }
            }
            else
            {
              echo "<font color=#ff3300>Open</font>";
              fclose($sock);
            }
      } ?>

<? sniff(22); ?>

Why do you keep posting then deleting your posts? Anyway most of the changes you made are no change. I don't think adding the quotes is going to make a difference because the code worked fine without them when it wasn't in its own function. Nope, just tested, no change.

Sorry, editing the post. Well, all I can say is that the function works on my pc as written. As I said, I am a beginer at PHP too. I will add though that the code you posted does not work for me. I get the same error as you mentioned "Closed 0"

The code works perfect for me when I insert it directly into my page. But when I try to encapsulate it into a function, it stops working and I have no clue why.

Put a return into your code.

such as

return $sock;

return 0;

$var = sniff(22);

I tried that and it had no effect. I don't think my problem is calling my function, the problem is somehow that the script can't great a new socket from within the function. I do already get a result from the function, its just an error code from the socket. And I thought you didn't NEED a return if you didn't need the result of the function.