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".

damiarita

<p>Addon for Contact Form 7 that creates a new kind of input that contains the URL of the page the user visited before the contact form page. This plugin works well with cache plugins, because the field is filled using javascript on the user’s computer in stead of the server.</p>
<p>You can choose where in your email to introduce this info by using a mail-tag, like any other field.</p>
<h4>How to use it?</h4>
<p>Once you have installed and activated your plugin, a new type of field will be available in your Contact Form 7 forms. In order to add it to your form, you can either click on the “Referrer” button above your form editor, or add the shortcode like: [cf7rfr_referrer {your-referrer}] ({your-referrer} has to be replaced by the name you want to give the field)</p>
<p>To recover the field’s info on your email, use this tag: [{your-referrer}]. It will print a URL.</p>
<h4>What referrer?</h4>
<p>This plugin looks at the HTTP referrer. Not at the traffic source. So, if your user comes from google, clicks some links in your site and ends up in your contact form page, the field will contain the last page in your site your client visited. It will not tell you whether the client landed from Google. This is meant to give you some context to the user’s message. Sometimes, they say “I love this product!” but you have no idea which one they are talking about. With the referrer field, at least you know what they saw last.</p>


Referrer Input for Contact Form 7

Contact Form 7 Addon that creates a cache-resistant input that contains the URL of the page the user visited before the contact form page.

track-incoming-referrer vs Referrer Input for Contact Form 7