title: Mailchimp PHP API variables not sending
body: <p>I am just trying to figure out why this won't work. It sends to MailChimp with the API but has some problem with the way it received the email address. If I send just a string like the second example, it works fine.</p>
  
  <p>Something must be wrong in my formatting, any ideas. I tried with variables I set, but that doesn't work either.</p>
  
  <p>Thanks</p>
  
  <pre><code>//SEND INFO TO MAILCHIMP
                  $MailChimp = new \Drewm\MailChimp($api);
                  $result = $MailChimp-&gt;call('lists/subscribe', array(
                                  'id'                =&gt; 'e659124bf2',
                                  'email'     =&gt; array('email'=&gt; $_POST['email']),
                                  'merge_vars'        =&gt; array('FNAME'=&gt;$_POST['usersName'], 'LNAME'=&gt;$_POST['usersLastName']),
                                  'double_optin'      =&gt; false,
                                  'update_existing'   =&gt; true,
                                  'replace_interests' =&gt; false,
                                  'send_welcome'      =&gt; false,
                              ));
                  print_r($result);
  </code></pre>
  
  <p>But if I put simple strings in it works fine: </p>
  
  <pre><code>//SEND INFO TO MAILCHIMP
                  $MailChimp = new \Drewm\MailChimp($api);
                  $result = $MailChimp-&gt;call('lists/subscribe', array(
                                  'id'                =&gt; 'e659124bf2',
                                  'email'     =&gt; array('email'=&gt; 'exampe@example.com),
                                  'merge_vars'        =&gt; array('FNAME'=&gt; 'John', 'LNAME'=&gt;'smith'),
                                  'double_optin'      =&gt; false,
                                  'update_existing'   =&gt; true,
                                  'replace_interests' =&gt; false,
                                  'send_welcome'      =&gt; false,
                              ));
                  print_r($result);
  </code></pre>