title: Get HTTP Referrer on Redirection
body: <p>How can you get the HTTP Referrer when redirected from another website, not when they click on a link since it would work for <code>$_SERVER['HTTP_REFERER']</code>, but it doesn't work when a user has been redirected a website and the referrer would be empty.</p>
  
  <p>What will be the method to get the referrer?</p>