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; if HOSTNAME = 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? -- David Robley Techno-JoaT, Web Maintainer, Mail List Admin, etc CENTRE FOR INJURY STUDIES Flinders University, SOUTH AUSTRALIA Bald: follicularly challenged. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
RE: [PHP] IP Address Converted to Computer Name
Thanks for your response David. I am new to PHP. Are you saying that the code would look like this: ? gethostname for $IPADDR; if $HOSTNAME = $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; if HOSTNAME = 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? -- David Robley Techno-JoaT, Web Maintainer, Mail List Admin, etc CENTRE FOR INJURY STUDIES Flinders University, SOUTH AUSTRALIA Bald: follicularly challenged. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED] -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
Re: [PHP] IP Address Converted to Computer Name
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;
if $HOSTNAME = $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;
if HOSTNAME = 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
snippet.
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 129.96.218.127 and 129.96.218.27 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
CENTRE FOR INJURY STUDIES Flinders University, SOUTH AUSTRALIA
NEWS! Stolen painting found by tree
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