title: Paypal IPN Custom field
body: <p>I know I can send a custom field using IPN with $_POST['custom']
  But can I do that with an uploaded file? More specifically an uploaded image? </p>
  
  <p>And what if I have two custom fields? I previously used something like this:</p>
  
  <pre><code>&lt;input type="hidden" name="custom" value="&lt;?php echo $a.'|'.$b ?&gt;"/&gt;
  </code></pre>
  
  <p>But that was just text! Now I want to upload a file and I also have custom text, then I want to get it.</p>
  
  <p>Is this possible and how would that look like?</p>
  
  <p>Thanks!</p>