Inviare email da Drupal con le API 2.0 di Mailchimp

/**
 * @param array $emails
 *   The list of addresses to send the newsletter to.
 * @param string $subject
 *   The newsletter subject
 * @param array $sections
 *   An array of sections that will be merged into template. Keys have to be
 *   equal to the template's sections in MailChimp. Remember that Mailchimp APIs
 *   does not support repeated sections in templates.
 */ 
function send($emails, $subject, $sections) {
  try {
    // 'mailchimp_api_key' contains the api key provided by MailChimp.
    $mailchimp = new Mailchimp(variable_get('mailchimp_api_key', ''));
    // Unique identifier for the newly created segment.
    $uuid = format_string("Newsletter @time", array('@time' => format_date(time(), 'custom', 'D, d/m/Y - H:i')));
 
    // Create the static segment, 'mailchimp_list' is the identifier
    // of a MailChimp list.
    $segment = $mailchimp->lists->staticSegmentAdd(
      variable_get('mailchimp_list', ''),
      $uuid
    );
 
    // Save the newly created segment id for later use.
    $segment = $segment['id'];
 
    for each ($emails as $email) {
      // Subscribe each email to MailChimp, if email already exists user data are updated.
      $result = $mailchimp->lists->subscribe(
        variable_get('mailchimp_list', ''), // The list to subscribe the user to.
        array('email' => $email),
        array(), // Merge vars, not used here.
        'html', // Email type.
        FALSE, // Double optin.
        TRUE, // Update existing.
        TRUE // Replace interests.
      );
 
      // Save internal MailChimp identifier for later use.
      $email = $result['email'];
      $euid = $result['euid'];
      $leid = $result['leid'];
 
      // Add the user to the static segment.
      $mailchimp->lists->staticSegmentMembersAdd(
        variable_get('mailchimp_list', ''),
        $segment,
        array(
          array(
            'email' => $email,
            'euid' => $euid,
            'leid' => $leid,
          )
        )
      );
    }
 
    // Create the campaign.
    $campaign = $mailchimp->campaigns->create(
      'regular', // Campaigns type.
      array(
        'list_id' => variable_get('mailchimp_list', ''),
        'subject' => $subject,
        'from_email' => variable_get('mailchimp_from_mail', ''),
        'from_name' => variable_get('mailchimp_from_name', ''),
        'template_id' => variable_get('mailchimp_template_id', ''),  // MailChimp template id.
        'auto_footer' => TRUE, // Lets MailChimp add a footer to the mail.
        'inline_css' => TRUE,
        'generate_text' => TRUE, // Auto generate plain-text version from HTML version.
      ),
      array(
        'sections' => $sections,
      ),
 
      // Segment campaign (send this newsletter only to the user of this segment).
      // Condition is an array of rules of matching, here we only match on the
      // 'static_segment' field.
      array(
        'match' => 'all',
        'conditions' => array(array('field' => 'static_segment', 'op' => 'eq', 'value' => $segment))
      )
    );
 
    // Send the campaign. Optionally you could remove this line and send the
    // campaign directly from MailChimp.   
    $mailchimp->campaigns->send($campaign['id']);
 
  } catch (Exception $e) {
    drupal_set_message(t('Unexpected exception (@error)', array('@error' => $e->getMessage())), 'error'); 
  }
}

send(array('mail1@example.com', 'mail2@example.com'), 'This is the subject', array('mc_std_preheader_content' => 'Lorem ipsum', 'mc_std_content00' => 'Lorem ipsum'));