$_SERVER['HTTP_REFERER'] not working

I have the current set up of... a javascript file containing

$(document).ready(function() {
$.ajax({
    cache: false,
    type: 'GET',
    url: './memberfunctions/getRef.php',
    data: {},
    beforeSend:function(){
    },
    success:function(data){
        // successful request; do something with the data
        console.log(data);
    },
    error:function(){
        // failed request; give feedback to user
        alert("idk what happened");
    }
});
});

getRef.php is

<?php

$httpReferer = isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : null;

echo $httpReferer;

?>

If i go to pastebin, type in and click mysite.com, i go to mysite.com and the console says mysite.com. Obviously I want the console to say pastebin.com/######

I know HTTP_REFERER is insecure, vulnerable, poor, unreliable. It serves a tiny non-vital purpose.

Answers:

Answer

For your AJAX request, the referrer is not pastebin.com. Your parent page would have had the referrer set to pastebin.

You can try something like this as inline script:

<script> var ref = "<?php echo $_SERVER['HTTP_REFERER']; ?>"; </script>

OR below which need not be inline

<script> var ref = document.referrer; </script>

Unless am missing something in the intent of the AJAX call.

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