PHP - Get the public ip

Question

Possible Duplicate:
How do I find a user's IP address with PHP?

I have a form in my PHP page. Users fills in his credentials and the message and presses send. I get his question through email and can answer him.

But I would also like to add the public IP of the person to the email, is this possible?

Many thanks!

Why would you want to do this? – Oliver Charlesworth Jun 08 '11 at 22:02 — Oliver Charlesworth, Jun 08 '11 at 22:02

score 10 · Accepted Answer · answered Jun 08 '11 at 22:01

10

Try using $_SERVER['REMOTE_ADDR'] to fetch the user's IP address.

http://php.net/manual/en/reserved.variables.server.php

answered Jun 08 '11 at 22:01

Steven Mercatante

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On my local site i am getting 127.0.0.1. Can't I get my public ip on my local site. – Sep 07 '12 at 09:40

score 1 · Answer 2 · answered Jun 08 '11 at 22:04

1

You can use $_SERVER["REMOTE_ADDR"]. But it's not necessarily reliable.

answered Jun 08 '11 at 22:04

Oliver Charlesworth

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I'm not aware of any method of spoofing REMOTE_ADDR short of forging IP packets. However, it is worth nothign that REMOTE_ADDR may be the address of a proxy (even one you yourself set up) rather than the remote user. E.g., I have nginx in front of apache, so the REMOTE_ADDR apache receives is that of my nginx server. – Frank Farmer Jun 08 '11 at 22:06
@Frank: That's roughly what I was hinting at! – Oliver Charlesworth Jun 08 '11 at 22:07

score 1 · Answer 3 · answered Jun 08 '11 at 22:05

You can use $_SERVER['REMOTE_ADDR'] but if you really want to make sure you are getting the right IP and not the proxy IP then i have found this function to be helpful

Note : i am not the owner of this code, i found it somewhere over the internet

function get_real_ip()
{

    if (isset($_SERVER["HTTP_CLIENT_IP"]))
    {
        return $_SERVER["HTTP_CLIENT_IP"];
    }
    elseif (isset($_SERVER["HTTP_X_FORWARDED_FOR"]))
    {
        return $_SERVER["HTTP_X_FORWARDED_FOR"];
    }
    elseif (isset($_SERVER["HTTP_X_FORWARDED"]))
    {
        return $_SERVER["HTTP_X_FORWARDED"];
    }
    elseif (isset($_SERVER["HTTP_FORWARDED_FOR"]))
    {
        return $_SERVER["HTTP_FORWARDED_FOR"];
    }
    elseif (isset($_SERVER["HTTP_FORWARDED"]))
    {
        return $_SERVER["HTTP_FORWARDED"];
    }
    else
    {
        return $_SERVER["REMOTE_ADDR"];
    }
}

Yeah please make these snippets popular so it's really easy to spoof the mail-scripts. — hakre, Jun 08 '11 at 22:16
Valid point but whats the real work around? Personally i store both `$_SERVER["REMOTE_ADDR"]` and any other forwarded for type var I can find. — Sabeen Malik, Jun 08 '11 at 22:29

score -4 · Answer 4 · answered Jun 08 '11 at 22:02

-4

You can use the following code:

$ip = $REMOTE_ADDR;

answered Jun 08 '11 at 22:02

Dave

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2

You shouldn't be relying on register globals to be turned on. – Jun 08 '11 at 22:04
I think that requires `register_globals` – Frank Farmer Jun 08 '11 at 22:04

PHP - Get the public ip

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