Tassos Marinos Developer of Joomla Extensions

The Referrer URL Condition

Published in EngageBox
Updated 16 Feb, 2022

The Referrer URL Condition gives you the ability to display a box to visitors coming to your Joomla! Website from a specific website or a list of websites by using their domain names as an indicator.

Referrer URL Display Conditions


In the table below you can see which options are available to setup the Referrer URL Condition.

Name Description
Match Set whether to match or not the set referrers.
Referrer URL

In this repeater field, you can type in your Referrer URLs or parts of them one by one separating them in new lines.
For example, you can type it like this:

Or even like this:

Or even a mix of them if you'd like but there's rarely a use case for typing them mixed.

Use Case

A very common use case for the Referrer URL Condition is when you want to show a box for a user who is coming from an affiliate site or a social network like Facebook. For instance, if the user is somehow coming to your Joomla! Website from Facebook then perhaps you'd like to let him know that you also have a Facebook Page for him to like.


The referrer discovery is not always 100% accurate. It relies on the HTTP_REFERER variable which can be empty due to the following reasons.

  • Some browsers limit access to not allow HTTP_REFERER to be passed
  • The user entered the site URL in browser address bar itself.
  • The user visited the site by a browser-maintained bookmark.
  • The user visited the site as first page in the window/tab.
  • The user clicked a link in an external application.
  • The user switched from a HTTPS URL to a HTTP URL.
  • The user has security software installed (Antivirus/Firewall/Browser extension) which strips the referrer from all requests.
  • The user is behind a proxy which strips the referrer from all requests.
  • The user visited the site programmatically (like, curl) without setting the referrer header.