public function addPromoCampaignParametersToUrl($url, $campaignName, $campaignMedium, $campaignContent = '')
{
if (empty($url)) {
return '';
}
if (strpos($url, '?') === false) {
$url .= '?';
} else {
$url .= '&';
}
$url .= $this->getCampaignParametersForPromoUrl($campaignName, $campaignMedium, $campaignContent);
return $url;
}