DEPRECATED: this library does not work with installs of Google Analytics using "Universal Analytics"
A PHP library for reading a website visitor's referral source information (e.g. what ad campaign, keywords a user clicked to come to my website) from their Google Analytics cookie. Useful for saving this information when, for example, a new user signs up on your website, to later analyze your customer acquisition channels.
The Google Analytics tracking script must be installed on the site making the request. See the documentation for more information on the proper installation of Google Analytics.
Include ReferralGrabber.php in your PHP code, and then call $data = ReferralGrabber::parseGoogleCookie($_COOKIE['__utmz']);
The returned $data array will be a map of the keys source, medium, term, content, campaign, gclid and their respective values.
Save all of these referrer parameters in your users table. See our blog post about building a killer marketing dashboard using this data at http://blog.rjmetrics.com/?p=855.
Thanks to Justin Cutroni for laying the groundwork for this code here http://cutroni.com/blog/2009/03/18/updated-integrating-google-analytics-with-a-crm/.
See LICENSE file for terms of using this library.
RJMetrics retains creative control, spin-off rights, and theme park approval for Mr. Referral Grabber, Baby Referral Grabber, and any other Referral Grabber family character that might eminate therefrom.