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How to prevent HTTP_REFERER from being overwritten in Wordpress?

0 votes

In the header.php file of my WordPress site I have the following code:

$_SESSION['refererurl'] = $_SERVER['HTTP_REFERER'];

To test the above code, I placed the following code in the front-page.php file (and it works):

    echo $_SESSION['refererurl'];

I want to track the referrer URL that led a visitor to my site from an external site for tracking purposes. The problem is that $_SERVER['HTTP_REFERER'] resets on page-load, so while the information is useful when a visitor first lands on my website, it's overwritten whenever the visitor navigates further into my site.

Is there any way to store the value of $_SERVER['HTTP_REFERER'] when a visitor first arrives at my site from an external site for as long as the visitor is on my site?

posted Jul 15, 2017 by anonymous

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1 Answer

0 votes

Very simple - only set it if it isn't already set.

if(!isset($_SESSION['refererurl'])) {
$_SESSION['refererurl'] = $_SERVER['HTTP_REFERER'];

answer Jul 20, 2017 by Vipin
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