title: Passing a $_GET variable from Wordpress page into external iFrame
body: <p>I have searched throughout all of the internets to fix this issue - I am sure this can be done! 
  I am trying to pass a <code>$_GET</code> variable into an external page that is accessed through an <code>iframe</code>. 
  My website is done on <code>Wordpress</code> and I have downloaded a <code>plugin</code> to use an <code>iframe</code> so that I can show a page that contains <code>PHP</code>. 
  This is the way it works: </p>
  
  <p>The page on <code>Wordpress</code> should have a <code>$_GET</code> parameter in its <code>URL</code> 
  (like this: <a href="http://www.url.com/page/refer-a-friend/?source=CRM" rel="nofollow">http://www.url.com/page/refer-a-friend/?source=CRM</a>)</p>
  
  <p>I need to access this <code>$_GET parameter</code> inside my <code>iframe</code>. The <code>iframe</code> src is a page I do not have on <code>Wordpress</code> but that is on my server (it's like an external link).</p>
  
  <p>I feel like I have given all the information I can but if not please feel free to ask and I can elaborate. It's driving me crazy! Thanks.  </p>
  
  <p>Please note I am passing the iFrame through the shortcode. 
  [iframe src="https://www.globaleye.com/external/refer.php" width="100%" height="500"]</p>