title: paypal returnurl is loggedin page
body: <p>I have a question about using paypal on a page where the user is logged into</p>
  
  <p>It is with php</p>
  
  <p>How can you have the user still authorised for that page if paypal is redirecting back to that page.</p>
  
  <p>I read something about giving the session_id to the custom variable with PDT
  What about, if you have multiple session variables. Can you also pass an array to the custom variable?</p>
  
  <p>How is it done, codingwise</p>
  
  <p>any insights are good</p>
  
  <p><strong>edit:</strong></p>
  
  <p>Is the PDT custom variable just some self invented name that you stick behind the 
  other obligated variables.</p>
  
  <p>like so: </p>
  
  <p>$req = "tx=$tx&amp;at=$token&amp;cmd=$cmd";</p>
  
  <p>$req .= "&amp;somevariablename=".session_id();</p>
  
  <p>thanks, Richard</p>