I have universal analytics installed on my website, and want to parse the __utmz cookie to get referral info. However, I never see this cookie set.
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It seems like with Universal Analytics, this cookie has disappeared, and you only get a single _ga cookie.
Source: https://developers.google.com/analytics/devguides/collection/analyticsjs/cookie-usage
Also mentioned here: How to get the referrer, paid/natural and keywords for the current visitor in PHP with new Google Analytics?
Also given that analytics is primarily a tool to collect aggregated information, I couldn't find (and I doubt) that there is any way to query GA to get this info back, given the _ga cookie.