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Posted by Malcolm Dew-Jones on 11/30/05 07:18
Michael (INERFAZE@aol.com) wrote:
: "Shane" <shane@weasel.is-a-geek.net> wrote in message
: news:pan.2005.11.30.02.31.11.424715@weasel.is-a-geek.net...
: > On Wed, 30 Nov 2005 01:38:05 +0000, Michael wrote:
: >
: >> "Carl" <_Nospam_@_DO_NOT_.USE> wrote in message
: >> news:7d7jf.20683$BZ5.9444@newssvr13.news.prodigy.com...
: >>> Michael wrote:
: >>>> Does someone have a reliable routine to get the domain name of the
: >>>> current user of a web page? Something like NSLookup. I have no
: >>>> problem
: >>>> getting their IP address, but I also want the domaine name.
: >>>> Thanks,
: >>>> -Michael
: >>>
: >>> how about:
: >>> http://www.php.net/manual/en/function.gethostbyaddr.php
: >>>
: >>> Carl.
: >>
: >> It may be just me, but that is the first think I tried and it gave me an
: >> IP
: >> address not a domain name.
: >> Maybe it's the... "or a string containing the unmodified ip_address on
: >> failure"... that is getting me.
: >> -Michael
: >
: > er you want to do a reverse dns lookup?
: > Thats fraught with issues.
: >
: > --
: > Hardware, n.: The parts of a computer system that can be kicked
: >
: > The best way to get the right answer on usenet is to post the wrong one.
: >
: I'm not sure what you mean, when I type "NSLookup 70.98.111.52"
: at the command prompt I get back "Name: box52.bluehost.com"
: It works instantally and it works every time (that I have tried.)
: I want to get that same answer via PHP.
Try some other ips.
An ip does not need a name, (and can have many).
Even if it has a name, it does not need reverse lookup data.
Even when that data is available, the name you get from the reverse lookup
is not necessarily the same name that anyone uses to access the host by
name. Indeed if you then lookup the name (i.e. you name you just got from
the reverse lookup) then you may find it does not even resolve to the same
ip you originally looked up.
As for the gethostbyaddr function, it appears to return the original
(input) address if it can't find a better name to go with it.
[Back to original message]
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