Jetpack_Subscriptions_Widget::update PHP Method

    function update($new_instance, $old_instance)
    {
        $instance = $old_instance;
        $instance['title'] = wp_kses(stripslashes($new_instance['title']), array());
        $instance['subscribe_text'] = wp_filter_post_kses(stripslashes($new_instance['subscribe_text']));
        $instance['subscribe_placeholder'] = wp_kses(stripslashes($new_instance['subscribe_placeholder']), array());
        $instance['subscribe_button'] = wp_kses(stripslashes($new_instance['subscribe_button']), array());
        $instance['success_message'] = wp_kses(stripslashes($new_instance['success_message']), array());
        $instance['show_subscribers_total'] = isset($new_instance['show_subscribers_total']) && $new_instance['show_subscribers_total'];
        return $instance;
    }