On Tue, 20 Nov 2001 11:38, Ben Clumeck wrote:
> Thanks for your response David.  I am new to PHP.  Are you saying that
> the code would look like this:
> <?
> gethostname for $IPADDR;
> print "$HOSTNAME"
> ?>
> Would I then put the $HOSTNAME into my mail() script.  Sorry for the
> trouble.
> Ben
> -----Original Message-----
> From: David Robley [mailto:[EMAIL PROTECTED]]
> Sent: Monday, November 19, 2001 4:29 PM
> To: Ben Clumeck; [EMAIL PROTECTED]
> Subject: Re: [PHP] IP Address Converted to Computer Name
> On Tue, 20 Nov 2001 04:08, Ben Clumeck wrote:
> > I am trying to convert an ip address to a computer name.  Then I am
> > putting it into the mail() script.  However, when I do this it come
> > up blank.  I am putting $r_hostname in the mail() script.  Can anyone
> > tell me why its not working?  The script I am using is:
> > <?
> > $r_hostname = gethostbyaddr($REMOTE_ADDR);
> > if ($REMOTE_ADDR == "$r_hostname");
> > echo "$r_hostname";
> > ?>
> >
> > Thanks,
> >
> > Ben
> Remember that not all IP adrresses will resolve to a hostname. That
> said, there may be a flaw in your logic in the code snippet above :-)
> What you are saying is:
> gethostname for IPADDR;
> print HOSTNAME
> which will only work if the resolved hostname is the same as the IP
> address; I suspect that is not what you want?

When you reply, can you put your response at the bottom? Makes it ieasier 
to read the chronological story. Yes, I know Outhouse puts you at the top 
- another 'feature' from MS.

No, I am not saying the code should look like that; what I wrote is 
pseudocode that just tells what the flow of logic is.

To put it simply, you are only asking for $r_hostname to be echoed, in 
that particular code snippet, if the value in $r_hostname is the same as 
the IP address. And I notice there is a syntax error or three in your 

Now I guess that what you want to do is to add the remote hostname to the 
email only if it resolves and you get back a hostname rather than an IP 
address? If that is the case, then you want something like:

$r_hostname = gethostbyaddr($REMOTE_ADDR);
if ($REMOTE_ADDR != "$r_hostname") {
  echo "$r_hostname";

Note the curly brackets around the contents of the IF.

If you substitute the IP addresses and for 
$REMOTE_ADDR you'll see the first returns a hostname and the second 
returns just the IP address, so the first will print a hostname and the 
second won't.

David Robley      Techno-JoaT, Web Maintainer, Mail List Admin, etc

   NEWS! Stolen painting found by tree

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