After searching on google the keyword+query parameter were added in the redirect url which helped analytic softwares to process the browser referer for required data. For years we were able to track the organic traffic and keyword from $_SERVER['HTTP_REFERER'] of a user browser, however few years ago google started using
<meta content="origin" id="mref" name="referrer">
This "referrer" meta-tag basically tells browser to only add the origin in the referrer. That is if a user searches using https://www.google.co.in and reaches my website using that search engine, all I can get from PHP $_SERVER['HTTP_REFERER'] is https://www.google.co.in/.
My question is how can other website get the searched keywords now without using Google Analytics ?