Disable double opt-in for MailChimp for Restaurant Reservations

mailchimp-no-double-optin-for-rtb.php

<?php
/**
 * Plugin Name: Disable double opt-in for MailChimp for Restaurant Reservations
 * Plugin URI: http://themeofthecrop.com
 * Description: Modify the subscription request sent to MailChimp so that users do not receive the double opt-in email confirmation from MailChimp.
 * Version: 0.0.1
 * Author: Theme of the Crop
 * Author URI: http://themeofthecrop.com
 * License:     GNU General Public License v2.0 or later
 * License URI: http://www.gnu.org/licenses/gpl-2.0.html
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU
 * General Public License as published by the Free Software Foundation; either version 2 of the License,
 * or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
 * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * You should have received a copy of the GNU General Public License along with this program; if not, write
 * to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */
if ( ! defined( 'ABSPATH' ) )
	exit;
 
/**
 * Add a new Time Interval option to the booking schedule settings in
 * Restaurant Reservations by modifying the settings page array.
 */
if ( !function_exists( 'mcfrtb_no_double_optin' ) ) {
add_filter( 'mcfrtb_mailchimp_subscribe_args', 'mcfrtb_no_double_optin', 10, 2 );
function mcfrtb_no_double_optin( $args, $booking ) {

	$args['status'] = 'subscribed';
 
	return $args;
}
} // endif;