videomike - 9:34 pm on May 27, 2010 (gmt 0)

Unfortunately you won't get a referer if the search comes from the experimental google AJAX search or from the new https search.
This is a problem that I will have to deal with in my WP TID Generator product [wptidgenerator.com], too.

binarymonkey suggested the following code on the google forum [google.com] to deal with that problem:

/**
* Returns an array with details held in Google Analytics cookie,
* or false if cookie not set.
*
* @returns array|bool
*/
function google_analytics_cookie_data() {

if(isset($_COOKIE['__utmz'])) {

preg_match_all('$[a-z]*=[^\|]*$', $string, $matches);

$ga_data = array();
foreach($matches[0] as $kvpair) {

$bits = explode('=',$kvpair,2);

$key = $bits[0];
$val = $bits[1];

switch($key) {

case 'utmcsr':
$key = "Source";
break;

case 'utmccn':
$key = "Campaign";
break;

case 'utmcmd':
$key = "Medium";
break;

case 'utmcct':
$key = "Referring Page";
break;

case 'utmctr':
$key = "Keywords";
break;

}

$ga_data[$key] = $val;

}

return $ga_data;

} else {
return false;
}

}

It extracts the keywords from the google analytics cookie, which of course means that you have to run google analytics in order to be able to use it.

Mike