<?php
/*
* Name: Universal Analytics Cookie Parser Class
* Description: Parses the new format Universal Analytics cookie.
* Developer: Matt Clarke
* Date: January 10, 2013
*/

class UniversalAnalyticsCookieParser{

    // Parse the _ga cookie if found
    function __construct() {
        if( isset($_COOKIE["_ga"]) ){
            echo $this->getCid();
        }
    }

    // Handle the parsing of the _ga cookie
    public function parseCookie()
    {
        list($version,$domainDepth, $cid1, $cid2) = split('[\.]', $_COOKIE["_ga"],4);
        return array('version' => $version, 'domainDepth' => $domainDepth, 'cid' => $cid1.'.'.$cid2);
    }

    // Get cid
    public function getCid()
    {
        $contents = $this->parseCookie();
        return $contents['cid'];
    }

}

?>