The $_GET does not contain utm_source. How to Retrieve UTM Tags in PHP?

Many encounter the issue when UTM tags are not fully transmitted through $_GET or $_SERVER. Why does this happen? The issue lies in the specifics of URL parsing.

“I can’t get all UTM tags from the address. `utm_source` and `utm_medium` are being cut off.”

Solutions

1. Check the URL. Ensure that all parameters are properly encoded.
2. Use parse_str. This function will help correctly parse the query string.
3. Check the server. Some settings may limit the length or format of the URL.

// Получаем текущий url в php
$url = ((!empty($_SERVER['HTTPS'])) ? 'https' : 'http') . '://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']; 
$parts = parse_url($url); // делаем из строки массив
parse_str($parts['query'], $query); // из массива получаем запрос
 
// выводим utm метки полученные из адресной строки через php
echo $query['utm_source'];
echo $query['utm_medium'];
echo $query['utm_campaign'];
echo $query['utm_content'];

$qStr = $_SERVER['QUERY_STRING'];
parse_str($qStr, $query);
 
echo $query['utm_source'];
echo $query['utm_medium'];
echo $query['utm_campaign'];
echo $query['utm_content'];

This code correctly extracts all UTM tags from the string.

P.S. If the solution doesn’t work, check the server settings.