Chris Dennis

<p>The IP Tools plugin provides a number of ways to control the content displayed<br />
to the visitor depending on whether they have connected to the server<br />
via IPv4 or IPv6.</p>
<p>IPv6 is slowly being adopted, and will eventually replace IPv4.<br />
There is plenty of information on this topic on the internet —<br />
on <a href="https://en.wikipedia.org/wiki/IPv6" rel="nofollow ugc">Wikipedia</a>, for example.</p>
<p>Suggestions for more things to add to this tool box will be welcome.</p>
<h4>Shortcodes</h4>
<p>Place these shortcodes in your posts and pages.</p>
<ul>
<li><code>[ipt_address]</code> is replaced by the visitor’s IP address.</li>
<li><code>[ipt_ipv6logo width=80px]</code> is replaced by an IPv6 logo (from the<br />
<a href="http://www.worldipv6launch.org/" rel="nofollow ugc">World IPv6 Launch</a> website)<br />
displayed with the given width.  The default width is 64 pixels: the width can be<br />
specified in any <a href="http://www.w3.org/TR/css3-values/#lengths" rel="nofollow ugc">CSS length unit</a>.</li>
<li><code>[ipt_ipv6only]...text...[/ipt_ipv6only]</code> displays the text only if IPv6 is in use.</li>
<li><code>[ipt_ipv4only]...text...[/ipt_ipv4only]</code> displays the text only if IPv4 is in use.</li>
</ul>
<p>Other shortcodes can be nested within these last two.</p>
<p>Note that shortcodes can be used in text widgets, but only if the theme includes<br />
the necessary filter.<br />
If shortcodes in widgets are not working in your current theme,<br />
you need to modify your WordPress theme and put the following<br />
code into the “functions.php” file of the theme.</p>
<pre><code><?php add_filter('widget_text', 'do_shortcode'); ?>
</code></pre>
<p>Thanks to the <a href="http://www.lost-in-code.com/platforms/wordpress/wordpress-shortcode-in-text-widget/" rel="nofollow ugc">Lost in Code website</a> for this tip.</p>
<h4>CSS Classes</h4>
<p>IP Tools creates CSS which can be used to hide any HTML element depending on whether IPv4 or IPv6 is in use.</p>
<p>It defines classes <code>ipt_ipv4only</code> and <code>ipt_ipv6only</code> which basically do what they say: the element<br />
with that class is modified with <code>display: none</code> if the visitor’s IP address is in the other IP domain.</p>
<p>For example, if you included the following HTML in a page, post, or widget<br />
only the relevant section of text would be displayed to the user.</p>
<pre><code><div class="ipt_ipv4only">
    <p>You've come to this webpage via IPv4 -- 
that's <em>so</em> last century.
</div>
<div class="ipt_ipv6only">
    <p>Well done!  You're enjoying the modern wonders of IPv6.
</div>
</code></pre>
<h4>Widgets</h4>
<p>So far, IP Tools just provides one small widget called ‘IP Tools Address’ that displays the visitor’s IP address — something like<br />
‘IPv4 address: 12.34.56.78’ or ‘IPv6 address: 2001:0db8:85a3:0000:0000:8a2e:0370:7334’.</p>
<p>The title of the widget can be changed from its default value of ‘IP Tools’.</p>


IP Tools

IP Tools is a small collection of useful shortcodes, widgets, and classes related to IP addresses.

GeertHauwaerts

<p>WordPress IPv4 Exhaustion Counter is a widget that visualizes the status of IPv4 address exhaustion which mashed up with the “IPv4 Global Unicast Address Assignments” provided by IANA and “IPv4 Address Report” researched by Mr. Geoff Huston of APNIC.</p>
<h3>Credits</h3>
<p>The IPv4 Exhaustion Counter itself has been created by Inetcore. The widget is only a small wrapper around the API call of the counter.</p>


WordPress IPv4 Exhaustion Counter Widget

Wordpress IPv4 Exhaustion Counter is a widget that visualizes the status of IPv4 address exhaustion.

IP Tools vs WordPress IPv4 Exhaustion Counter Widget