title: MailChimp API PHP - Add to Interest Group
body: <p>I'm currently using the MailChimp API for PHP, version 1.3.1 (<a href="http://apidocs.mailchimp.com/api/downloads/#php" rel="nofollow noreferrer">http://apidocs.mailchimp.com/api/downloads/#php</a>)</p>
  
  <p>I've set up a list in MailChimp, and would like to dynamically add:</p>
  
  <ol>
  <li>Subscribers to the list (done: <code>$objMailChimp-&gt;listBatchSubscribe($strMailingListID, ...)</code>)</li>
  <li>Interest Groupings (done: <code>$objMailChimp-&gt;listInterestGroupingAdd($strMailingListID, ...)</code>)</li>
  <li>Interest Groups into those Groupings (done: <code>$objMailChimp-&gt;listInterestGroupAdd($strMailingListID, ...)</code>)</li>
  <li>Subscribers assigned to relevant Groups (not done)</li>
  </ol>
  
  <p>The API (<a href="http://apidocs.mailchimp.com/api/1.3/#listrelated" rel="nofollow noreferrer">http://apidocs.mailchimp.com/api/1.3/#listrelated</a>) is somewhat unclear on how to add a subscriber to an interest group - does anyone here have any ideas?</p>