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Get the IP Address of a Visitor with PHP (or WordPress Shortcode)

There are hundreds of functions found over the web that can be used to find the real IP address of a visitor. Here's one function that works well for us. The function searches environmental variables, validates a likely IP against PHP5's filter_var() function and then returns the value.

1
<?php 
2
/*
3
 Get the IP Address of a Visitor with PHP
4
 http://www.beliefmedia.com/get-ip-address
5
*/
6
 
7
function beliefmedia_ip() {
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 foreach (array('HTTP_CLIENT_IP', 'HTTP_X_FORWARDED_FOR', 'HTTP_X_FORWARDED', 'HTTP_X_CLUSTER_CLIENT_IP', 'HTTP_FORWARDED_FOR', 'HTTP_FORWARDED', 'REMOTE_ADDR') as $key) {
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     if (array_key_exists($key, $_SERVER) === true) {
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         foreach (explode(',', $_SERVER[$key]) as $ip) {
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            if (filter_var($ip, FILTER_VALIDATE_IP) !== false) {
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            return $ip;
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          }
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        }
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     }
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  }
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}
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/* Usage */
20

As with all IP-based (or HTTP header) tools, it's easy to spoof. For the majority of purposes, though, it serves its purpose nicely.

Display a User IP Address with WordPress Shortcode

For the sake of it, here's how you would display the IP of a visitor in a WordPress post or page with very simple shortcode.

Copy and paste the WordPress function into your theme's functions.php file or, if you sensibly have one installed, your custom functions plugin.

1
<?php 
2
/*
3
 Get the IP Address of a Visitor with PHP
4
 http://www.beliefmedia.com/get-ip-address
5
*/
6
 
7
function beliefmedia_ip() {
8
 foreach (array('HTTP_CLIENT_IP', 'HTTP_X_FORWARDED_FOR', 'HTTP_X_FORWARDED', 'HTTP_X_CLUSTER_CLIENT_IP', 'HTTP_FORWARDED_FOR', 'HTTP_FORWARDED', 'REMOTE_ADDR') as $key) {
9
     if (array_key_exists($key, $_SERVER) === true) {
10
         foreach (explode(',', $_SERVER[$key]) as $ip) {
11
            if (filter_var($ip, FILTER_VALIDATE_IP) !== false) {
12
            return $ip;
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          }
14
        }
15
     }
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  }
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}
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add_shortcode('getip','beliefmedia_ip');

You may optionally download the WordPress plugin. Render the IP address of a user with [getip].

Usage:

The shortcode of [getip] would return 216.73.217.128 (your IP address).

Applications

If you wanted to expand upon the function, you could add geo-specific services to users, add maps, use custom geographically targeted titles, render custom advertising, display a geographic user plot, or deliver geographically appropriate content (such as local weather) - all of which we'll be sharing in the future (it's the purpose of sharing this simple function).

Download


Title: Get the IP Address of a Visitor with PHP
Description: Return the IP address of a user with PHP or WordPress shortcode (WP Shortcode).
  Download • Version 0.1, 517.0B, zip, Category: WordPress Shortcodes
WordPress Plugins (General), (800.0B)    PHP Code & Snippets, (501.0B)    

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Picture of Martin Khoury

Martin Khoury

Martin is the Managing Director of BeliefMedia Pty Limited, and Australia's leading Finance Marketing Specialist. He is supported by a team of Australia's finest. Read more about Marty here.
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