Redirection kepping referer

Hello

I'm looking for a way to have a referer when I'm using a redirection.

Let me explain.
I have a page on domain1 which send the visitor to the domain2.
I use a header redirection.

But on domain2, I want to know if the visitor is coming by this redirection.
Everytime I checked the referer, it's blank...

Who can tell me how to redirect a visitor and identify it after ?

Thanks a lot

 

redirect to domain2.com?something

and in header put the relevant code

it will show up in analytics

 

Hello

My code in domain1 is :
header("Status: 301 Moved Permanently", false, 301);
header("Location: domain2");
exit();

I also try :
header("Refresh: 0;url=domain2");
exit();


And the code on the second domain :
$url =$_SERVER['HTTP_REFERER'];
echo $url;

 

What he is saying that you do something like:

header("location: domain.com/?utm_source=domain1");

Code (markup):

Then on your domain 2 do:

$referrer = isset($_GET['utm_source']) ?  $_GET['utm_source'] : 'no referrer';
echo $referrer;  

Code (markup):

 

This snippet might get you in right direction:

<?php
$rdom = "http://domain.com/"; //Domain1
$ref = $_SERVER['HTTP_REFERER']; //Get Referrer

//Check if user coming from domain1
if ($ref == $rdom) {
    echo "Correct"; //Correct Referrer
}
else {
    echo "Wrong"; //Wrong Referrer
}
?>

PHP:

 

You might find this helpful too :

HTTP_REFERER is an environment variable sent by the browser. Some browsers give the user the option to remove it when making a http request.

 

Hello

Thx to all of you.
Unfortunatly, the redirection broke the referer so HTTP_REFERER is useless.

But I used the technique with a special page and it's fine !

So THANKS FOR YOUR HELP

 

Why not check if referer is external and then save it to a session?

something like this

if ($_SERVER['HTTP_REFERER'], 0, strlen($yourUrl)) != $yourUrl)
{
     // ofcource session_start() must be started!
     $_SESSION['ref'] = $_SERVER['HTTP_REFERER'];
}

// do your header thing

PHP: