/**
* Ajax Callback Function for the Settings Page
*/
public function hub_action_callback()
{
$tls_hub_action = wp_strip_all_tags($_POST['tls_hub_action']);
$message = '';
if (strtolower($tls_hub_action) == 'subscribe') {
$this->current_options['subscription_status'] = 'Subscribing';
update_option(self::$option_name, $this->current_options);
$HubSubscriber = new HubSubscriber(self::$option_name, $this->current_options);
echo $HubSubscriber->subscribe();
}
wp_die();
// this is required to terminate immediately and return a proper response
}
