Также в случае отсутствия gclid и utm определять источник по $_SERVER[‘HTTP_REFERER’] учитывая домены поисковых систем.
$seo_params=array('ga_cid','gclid','utm_source','utm_medium','utm_campaign','utm_content','utm_term');
$seo_cookies=$seo_cookies_default=array();
foreach($seo_params as $sp){
switch($sp){
case 'gclid':
$seo_cookies_default[$sp]='NULL';
break;
case 'utm_source':
$seo_cookies_default[$sp]='direct';
break;
default:
$seo_cookies_default[$sp]='none';
break;
}
}
$update_cookies=false;
if(isset($_GET['gclid'])&&$_GET['gclid']!=''){
$update_cookies=true;
foreach($seo_params as $sp){
switch($sp){
case 'gclid':
$seo_cookies[$sp]=$_GET[$sp];
break;
case 'utm_source':
$seo_cookies[$sp]='google';
break;
case 'utm_medium':
$seo_cookies[$sp]='cpc';
break;
default:
if(stristr($sp,'utm_')&&isset($_GET[$sp])&&$_GET[$sp]!=''){
$seo_cookies[$sp]=$_GET[$sp];
}
else{
$seo_cookies[$sp]='none';
}
break;
}
}
}
else{
$is_utm=false;
foreach($seo_params as $sp){
if(stristr($sp,'utm_')&&isset($_GET[$sp])&&$_GET[$sp]!=''){
$seo_cookies[$sp]=$_GET[$sp];
$is_utm=true;
$update_cookies=true;
}
else{
$seo_cookies[$sp]='none';
}
}
if(!$is_utm){
$referer=$_SERVER['HTTP_REFERER'];
if($referer!=''){
$parse_referer=parse_url($referer);
$referer_domain=$parse_referer['host'];
if($referer_domain!=''&&$referer_domain!=$_SERVER['HTTP_HOST']){
$update_cookies=true;
$organics=array('google','yandex','bing');
$is_organic=false;
foreach($organics as $organic){
if(stristr($referer_domain,$organic)){
$is_organic=true;
foreach($seo_params as $sp){
switch($sp){
case 'utm_source':
$seo_cookies[$sp]=$organic;
break;
case 'utm_medium':
$seo_cookies[$sp]='organic';
break;
default:
if(stristr($sp,'utm_')){
$seo_cookies[$sp]='none';
}
break;
}
}
}
}
if(!$is_organic){
foreach($seo_params as $sp){
switch($sp){
case 'utm_source':
$seo_cookies[$sp]=$referer_domain;
break;
case 'utm_medium':
$seo_cookies[$sp]='referral';
break;
default:
if(stristr($sp,'utm_')){
$seo_cookies[$sp]='none';
}
break;
}
}
}
}
}
}
}
if($_COOKIE['_ga']!=''){
$ga_cookie_split=explode('.',$_COOKIE['_ga']);
if($ga_cookie_split[2]&&$ga_cookie_split[3]){
$ga_cid=$ga_cookie_split[2].'.'.$ga_cookie_split[3];
$seo_cookies['ga_cid']=$ga_cid;
}
}
foreach($seo_params as $sp){
if($update_cookies||!isset($_COOKIE['local_'.$sp])||$sp=='ga_cid'){
$cv=($seo_cookies[$sp]!='')?$seo_cookies[$sp]:$seo_cookies_default[$sp];
setcookie('local_'.$sp,$cv,time()+31536000,'/',$_SERVER['HTTP_HOST']);
$_COOKIE['local_'.$sp]=$cv;
}
}
function add_seo_params_to_letter(){
global $seo_params;
$text='<hr/>';
foreach($seo_params as $sp){
$text.=$sp.': '.$_COOKIE['local_'.$sp]."<br/>";
}
return $text;
}
Функция add_seo_params_to_letter используется для добавления в письма сохраненных данных.
Например в modx:
// /core/components/formit/model/formit/fihooks.class.php
public function email(array $fields=array()){
// ...
$message.=add_seo_params_to_letter();
// ...
}