Instagram Linktree Substitute with Google Analytics

index.php

<?

/*********************************

Instagram Linktree substitute w/GA integration
Inspired by Glenn Walker's PHP-UA

Christopher S. Penn

https://www.christopherspenn.com/
https://www.trustinsights.ai

Provided under the GNU Public License with absolutely no warranty or support.

I recommend you place this in a folder in your root domain called /instagram and then change the link in your Instagam bio to whatever your website is plus instagram - for example, https://www.christopherspenn.com/instagram

Requires PHP 5.6 or better.

**********************************/

// Configuration - edit these parts!

// Where are we sending people from Instagram?
$destination = "https://www.christopherspenn.com/";

// Insert your UTM codes here!
$source = "instagram"; // utm_source
$medium = "social"; // utm_medium
$campaign = "biolink"; // utm_campaign

// Insert your Google Analytics account ID here, beginning with UA-
$analyticsua = "UA-336872-14";

/*********************************
// Don't edit past here
**********************************/

$curlurl = "https://www.google-analytics.com/collect?v=1&tid=".$analyticsua."&cid=".$guid."&t=pageview&cs=".$source."&cm=".$medium."&cn=".$campaign;

$finalurl = "Location: ".$destination."?utm_source=".$source."&utm_medium=".$medium."&utm_campaign=".$campaign;

$guid = microtime();

$curl = curl_init();
curl_setopt_array($curl, array(
    CURLOPT_RETURNTRANSFER => 1,
    CURLOPT_URL => $curlurl,
    CURLOPT_USERAGENT => "Instagram-Bio-Link-Tracker",
    ));
$resp = curl_exec($curl);
curl_close($curl);

header("HTTP/1.1 301 Moved Permanently"); 
header($finalurl);

?>