GoogleCookieTools.php

<?php

class GoogleCookieTools {
	
	/**
	 * Splits Google's cookie into nicely named pairs
	 *
	 * @return array
	 * @author Kevin Ruscoe
	 */
	public static function splitCookie()
	{
		
		$output = array();
		
		if( isset($_COOKIE['__utmz']) ){
			
			$cookie = $_COOKIE['__utmz'];
		
			$cookie_parts = explode("|", $cookie);
				
			foreach( $cookie_parts as $cookie_part ){
						
				$bits = explode("=", $cookie_part);
			
				$key = $bits[0];
				$value = $bits[1];
				
				$key = preg_replace('/[0-9.]+/', '', $key);
			
				// from: http://devblog.springest.com/anatomy-of-google-analytics-cookies/
				$key = str_replace(
					array(
						'utmcsr', 'utmccn', 'utmcmd', 'utmcct'
					), 
					array(
						'Campaign Source', 'Compaign Name', 'Campaign Medium', 'Campaign Terms'
					), 
				$key);
				
				$output[$key] = $value;
			
			}
			
		}
		
		return $output;
		
	}
	
}

?>