public static function getCampaignParameters()
{
$return = array(Config::getInstance()->Tracker['campaign_var_name'], Config::getInstance()->Tracker['campaign_keyword_var_name']);
foreach ($return as &$list) {
if (strpos($list, ',') !== false) {
$list = explode(',', $list);
} else {
$list = array($list);
}
$list = array_map('trim', $list);
}
return $return;
}