Gotcha: HTTP_X_FORWARDED_FOR returns multiple IP addresses

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re: Gotcha: HTTP_X_FORWARDED_FOR returns multiple IP addresses

tempest — Sat, 09 Aug 2008 11:34:42 GMT

substr($_SERVER['HTTP_X_FORWARDED_FOR'], 0, 15);

if the first ip is the goal then this should suffice, no need for explode. But I am not at all clear if the goal the first IP or the last.

re: Gotcha: HTTP_X_FORWARDED_FOR returns multiple IP addresses

Scotty — Tue, 10 Jun 2008 13:01:53 GMT

Thanks Viral and Neokio. The added line from Viral looks good and works for me. I was looking for a function like explode... so this is perfect.

re: Gotcha: HTTP_X_FORWARDED_FOR returns multiple IP addresses

Viral — Thu, 01 May 2008 11:44:15 GMT

:neokio

instead of using first member from $_SERVER['HTTP_X_FORWARDED_FOR'] retuning comma delimited value.

shouldn't we be using the last member of the array ?

something like,

$ip = $ip_array[ count($ip_array) - 1 ];

???

re: Gotcha: HTTP_X_FORWARDED_FOR returns multiple IP addresses

neokio — Mon, 03 Sep 2007 10:47:08 GMT

i ran into this about a year ago, and wrote this snippet as a workaround. Only tested it with a few proxies (Google translate, etc.), so no guarantees...

if (!empty($_SERVER['HTTP_X_FORWARDED_FOR']))

$ip = $_SERVER['HTTP_X_FORWARDED_FOR'];

else

$ip = $_SERVER['REMOTE_ADDR'];

// When viewed through an anonymous proxy, the address string

// contans multiple ip#s separated hy commas. This fixes that.

$ip_array = explode(",", $ip);

$ip = $ip_array[0];

re: Gotcha: HTTP_X_FORWARDED_FOR returns multiple IP addresses

jspurlin — Wed, 11 Jul 2007 13:39:44 GMT

In which order is the comma delimited list returned?. For example, if I am trying to get "the" original ip, is it first in the list (always)?

re: Gotcha: HTTP_X_FORWARDED_FOR returns multiple IP addresses

Boris Yeltsin's Zombie — Tue, 26 Jun 2007 10:36:04 GMT

Damn. I've written apps using this property and never knew it could send more than one IP. Thanks for the heads-up :)

re: Gotcha: HTTP_X_FORWARDED_FOR returns multiple IP addresses

Kim — Sun, 24 Jun 2007 00:10:20 GMT

Thank you James for solving this problem. We will update the source codes in IP2Location.