averageradical

<p>Non-technical summary: Track incoming referrer and write it to any hidden form field with the identifier “referrer” (this can be created in Contact Form 7, for example; see below). Also if the WordPress site redirects from HTTP to HTTPS, this plugin also overrides the redirect to add the referrer to the https URL.</p>
<p>Technical details: This plugin runs client-side JavaScript in every page in HEAD and if there isn’t a session cookie with the name “referrer”, then it writes a session cookie with the name “referrer” and the value of either document.referrer, or if that’s empty, the URL-encoded value of window.location.href. There is another client-side JavaScript in every page before  which writes the value of the “referrer” cookie to any INPUT with the ID “referrer”, if it exists.</p>
<p>When integrating with Contact Form 7, add a hidden input field such as the following:</p>
<pre><code>[hidden referrer id:referrer]
</code></pre>
<p>And then add to the Mail’s Message Body:</p>
<pre><code>Referrer: [referrer]
</code></pre>
<p>If you’re just integrating this with HTML, just add this to any form:</p>
<pre><code><input type="hidden" id="referrer" name="referrer" />
</code></pre>


track-incoming-referrer

Track incoming referrer and write it to any hidden form field with the identifier "referrer".

Vladimir Kolesnikov

<p>Adds the referrering link from which a commenting user came from to comment notifications and Comments screen in the Admin panel of your site.</p>
<p>This is an extended version of Donncha’s <a href="https://wordpress.org/extend/plugins/comment-referrers/" rel="ugc">Comment Referrers</a> plugin</p>
<p>ICS Comment Referrer:</p>
<ul>
<li>uses both server (HTTP Referer header) and client (works if JavaScript enabled) referrer identification;</li>
<li>cryptographically protects the server-generated referrer field;</li>
<li>adds referring links to comment notifications;</li>
<li>shows referring links in Admin Panel » Comments.</li>
</ul>
<h3>Contributors</h3>
<ul>
<li><a href="http://blog.sjinks.pro/" rel="nofollow ugc">Vladimir Kolesnikov</a></li>
<li><a href="https://launchpad.net/~rahermosillac" rel="nofollow ugc">Ricardo A. Hermosilla Carrillo</a></li>
<li><a href="https://launchpad.net/~pierre-slamich" rel="nofollow ugc">Pierre Slamich</a></li>
<li><a href="https://launchpad.net/~sunder67" rel="nofollow ugc">zeugma</a></li>
<li><a href="https://launchpad.net/~elkan76" rel="nofollow ugc">Mauricio Peñaloza S.</a></li>
</ul>
<h3>Bug Reports</h3>
<p>Please use <a href="https://bugs.launchpad.net/wp-plugin-comment-referrer/+filebug" rel="nofollow ugc">Launchpad</a> to report any bugs.</p>


ICS Comment Referrer

Adds the referrering link from which a commenting user came from to comment notifications and Comments screen in the Admin panel of your site.

track-incoming-referrer vs ICS Comment Referrer