Drupal → Отправить e-mail с вложением (аттачем)

/**
 * Form builder.
 */
function mymodule_send_form($form, $form_state) {
  $form['attachment'] = array(
    '#type' => 'file',
    '#title' => 'Attachment',
  );  
  $form['submit'] = array(
    '#type' => 'submit',
    '#value' => 'Send',
  );
  return $form;
}
 
/**
 * Validate callback.
 */
function mymodule_send_form_validate($form, &$form_state) {
  if ($file = file_save_upload('attachment', array(), 'public://')) {
    $form_state['values']['attachment'] = $file;
  }
  else {
    form_set_error('file', 'File not uploaded.');
  }
}
 
/**
 * Submit callback.
 */
function mymodule_send_form_submit($form, &$form_state) {
  drupal_mail(
    'mymodule',
    'send_attachment',
    'to@example.com',
    language_default(),
    array(
      'attachments' => array($form_state['values']['attachment'])
    )
  );
}
 
/**
 * Implements hook_mail().
 */
function mymodule_mail($key, &$message, $params) {
  if ($key == 'send_attachment') {
    $message['subject'] = 'Mail with attachment';
    $message['body'][] = 'Body...';
  }
}