Find localhost’s IP number

**Gordon Burditt** · Jul 17 '05, 07:21 AM

Re: Find localhost’s IP number

>Hi, I am running apache on local pc/ under Windows.[color=blue]
>
>I need to figure out the ip number of the pc inside PHP. This is the
>number available when you do ipconfig, and not the 127.0.0.1![/color]

Never assume that a web server has only one IP address. It isn't
that uncommon for a web server to occupy an entire class C. (253
usable addresses or so.)
[color=blue]
>So the slow way I have figured out is to do a system call to doc,
>using `ipconfig`, and then regex the result and figure out the ip.
>Is there a fater/more efficient way to do this?[/color]

If you want the IP address that the client contacted the server on,
look at $_SERVER['SERVER_ADDR']. This may well vary if the server
has IP-based virtual hosts, and it might end up being 127.0.0.1 if
you accessed it with http://127.0.0.1/foo.php from your browser on
the server itself.

Gordon L. Burditt

**Chung Leong** · Jul 17 '05, 07:21 AM

Re: Find localhost?s IP number

"steve" <UseLinkToEmail @dbForumz.com> wrote in message
news:TvgLc.5519 3$5Y.34823@cycl ops.nntpserver. com...[color=blue]
> Hi, I am running apache on local pc/ under Windows.
>
> I need to figure out the ip number of the pc inside PHP. This is the
> number available when you do ipconfig, and not the 127.0.0.1!
>
> So the slow way I have figured out is to do a system call to doc,
> using `ipconfig`, and then regex the result and figure out the ip.
> Is there a fater/more efficient way to do this?
>
> --
> http://www.dbForumz.com/ This article was posted by author's request
> Articles individually checked for conformance to usenet standards
> Topic URL:[/color]
http://www.dbForumz.com/PHP-Find-loc...ict131475.html[color=blue]
> Visit Topic URL to contact author (reg. req'd). Report abuse:[/color]

http://www.dbForumz.com/eform.php?p=438714

gethostbynamel( $dns_name_of_co mputer).

**steve** · Jul 17 '05, 07:21 AM

Re: Re: Find localhost?s IP number

"Chung Leong" wrote:[color=blue]
> "steve" <UseLinkToEmail @dbForumz.com> wrote in message
> news:TvgLc.5519 3Y.34823@cyclop s.nntpserver.co m...[color=green]
> > Hi, I am running apache on local pc/ under Windows.
> >
> > I need to figure out the ip number of the pc inside PHP. This is[/color]
> the[color=green]
> > number available when you do ipconfig, and not the 127.0.0.1!
> >
> > So the slow way I have figured out is to do a system call to doc,
> > using `ipconfig`, and then regex the result and figure out the[/color]
> ip.[color=green]
> > Is there a fater/more efficient way to do this?
> >
> > --
> > http://www.dbForumz.com/ This article was posted by[/color]
> author’s request[color=green]
> > Articles individually checked for conformance to usenet standards
> > Topic URL:[/color]
> http://www.dbForumz.com/PHP-Find-loc...ict131475.html[color=green]
> > Visit Topic URL to contact author (reg. req’d). Report[/color]
> abuse:
> http://www.dbForumz.com/eform.php?p=438714
>
> gethostbynamel( $dns_name_of_co mputer).[/color]

I don’t have DNS on my pc, so I tried
gethostbynamel( ’localhost’)
but it returns 127.0.0.1

--
http://www.dbForumz.com/ This article was posted by author's request
Articles individually checked for conformance to usenet standards
Topic URL: http://www.dbForumz.com/PHP-Find-loc...ict131475.html
Visit Topic URL to contact author (reg. req'd). Report abuse: http://www.dbForumz.com/eform.php?p=438855

**steve** · Jul 17 '05, 07:21 AM

Re: Re: Find localhost?s IP number

"steve" wrote:[color=blue]
> [quote:5b9ab702e 4="Chung Leong"]"steve"
> <UseLinkToEmail @dbForumz.com> wrote in message
> news:TvgLc.5519 3Y.34823@cyclop s.nntpserver.co m...[color=green]
> > Hi, I am running apache on local pc/ under Windows.
> >
> > I need to figure out the ip number of the pc inside PHP. This is[/color]
> the[color=green]
> > number available when you do ipconfig, and not the 127.0.0.1!
> >
> > So the slow way I have figured out is to do a system call to doc,
> > using `ipconfig`, and then regex the result and figure out the[/color]
> ip.[color=green]
> > Is there a fater/more efficient way to do this?
> >
> > --
> > http://www.dbForumz.com/ This article was posted by[/color]
> author’s request[color=green]
> > Articles individually checked for conformance to usenet standards
> > Topic URL:[/color]
> http://www.dbForumz.com/PHP-Find-loc...ict131475.html[color=green]
> > Visit Topic URL to contact author (reg. req’d). Report[/color]
> abuse:
> http://www.dbForumz.com/eform.php?p=438714
>
> gethostbynamel( $dns_name_of_co mputer).[/color]

I don’t have DNS on my pc, so I tried
gethostbynamel( ’localhost’)
but it returns 127.0.0.1[/quote:5b9ab702e 4]

It works! must do it this way:
$hosts=gethostb ynamel(’’); (see
http://ca2.php.net/manual/en/functio...ostbynamel.php)

--
http://www.dbForumz.com/ This article was posted by author's request
Articles individually checked for conformance to usenet standards
Topic URL: http://www.dbForumz.com/PHP-Find-loc...ict131475.html
Visit Topic URL to contact author (reg. req'd). Report abuse: http://www.dbForumz.com/eform.php?p=438856

**steve** · Jul 17 '05, 07:21 AM

Re: Re: Find localhost?s IP number

"steve" wrote:[color=blue]
> [quote:a57631114 3="steve"][quote:a57631114 3="Chung[/color]
Leong"]"steve"[color=blue]
> <UseLinkToEmail @dbForumz.com> wrote in message
> news:TvgLc.5519 3Y.34823@cyclop s.nntpserver.co m...[color=green]
> > Hi, I am running apache on local pc/ under Windows.
> >
> > I need to figure out the ip number of the pc inside PHP. This is[/color]
> the[color=green]
> > number available when you do ipconfig, and not the 127.0.0.1!
> >
> > So the slow way I have figured out is to do a system call to doc,
> > using `ipconfig`, and then regex the result and figure out the[/color]
> ip.[color=green]
> > Is there a fater/more efficient way to do this?
> >
> > --
> > http://www.dbForumz.com/ This article was posted by[/color]
> author’s request[color=green]
> > Articles individually checked for conformance to usenet standards
> > Topic URL:[/color]
> http://www.dbForumz.com/PHP-Find-loc...ict131475.html[color=green]
> > Visit Topic URL to contact author (reg. req’d). Report[/color]
> abuse:
> http://www.dbForumz.com/eform.php?p=438714
>
> gethostbynamel( $dns_name_of_co mputer).[/color]

I don’t have DNS on my pc, so I tried
gethostbynamel( ’localhost’)
but it returns 127.0.0.1[/quote:a57631114 3]

It works! must do it this way:
$hosts=gethostb ynamel(’’); (see
http://ca2.php.net/manual/en/functio...stbynamel.php)[/quote:a57631114 3]

And a quick note, the $hosts variable above is an array. Take
$hosts[0] as the IP number!

**George Kinney** · Jul 17 '05, 07:29 AM

Re: Re: Find localhost?s IP number

"steve" <UseLinkToEmail @dbForumz.com> wrote in message
news:wkiLc.5644 1$5Y.4868@cyclo ps.nntpserver.c om...[color=blue][color=green]
> > gethostbynamel( $dns_name_of_co mputer).[/color]
>
> I don't have DNS on my pc, so I tried
> gethostbynamel( 'localhost')
> but it returns 127.0.0.1[/quote:a57631114 3]
>
> It works! must do it this way:
> $hosts=gethostb ynamel(''); (see
>[/color]
http://ca2.php.net/manual/en/functio...stbynamel.php)[/quote:a57631114 3][color=blue]
>
> And a quick note, the $hosts variable above is an array. Take
> $hosts[0] as the IP number![/color]

Just to clarify: getbyhostname(' localhost') *should* return 127.0.0.1, since
it almost always
defined as such in your hosts file. You should actually either use '', like
you did, or your known
machine name 'someserver.som edomain.com' if you want its actual IP.

And you don't need to have DNS on your PC, if you can look up *any* hostname
(not already
defined in your hosts file) then you are accessing a DNS server somewhere.
(look up anything
via nslookup at a command line, and it will tell you what server you are
currently using as part of
its response.)

Find localhost’s IP number

Find localhost’s IP number

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