<form method="post" action="<?php 
echo admin_url('admin-post.php?action=set_unbounce_domains');
?>
">
  <input type="hidden" name="domains" />
  <input type="hidden" name="user_id" />
  <input type="hidden" name="domain_id" />
  <input type="hidden" name="client_id" />
  <?php 
if (isset($outer_text)) {
    ?>
    <?php 
    echo $outer_text;
    ?>
  <?php 
}
?>
  <?php 
$style = isset($outer_text) ? 'vertical-align: baseline' : '';
?>
  <?php 
echo get_submit_button($text, $is_primary ? 'primary' : 'secondary', 'set-unbounce-domains', $wrap_in_p, array('data-set-domains-url' => admin_url('admin-post.php?action=set_unbounce_domains'), 'data-redirect-uri' => admin_url('admin.php?page=unbounce-pages'), 'data-api-url' => UBConfig::api_url(), 'data-api-client-id' => UBConfig::api_client_id(), 'data-wordpress-domain-name' => $domain, 'style' => $style));
?>
</form>