Activate WooCommerce Subscriptions recurring events for custom billing email for testing recurring payments

allow-recurring-events-in-stagemode.php

<?php   
/**
 * Test recurring payments in staging mode.
 * [USAGE] WooCommerce subscriptin is handling subscriptions as manual subscriptions if the 'stage' mode is on.
 * Luckly we can hook and filter by signup email. We don't want this to be working with all existing subscriptions so
 * we are filtering by email.
 *
 * [INSTALLATION] This can be packed as mu-plugin.
 * 
 * [DISCLAMER] This is critical developer only information and it can trigger real payments in your stage environment. 
 * Please be careful and use it on your own risk.
 * 
 * @package   WooCommerce Subscriptions
 * @category  WooCommerce 
 */


add_filter( 'woocommerce_subscription_is_manual', 'bo_activate_recurring_payments_for_email', 10, 2 );

function bo_activate_recurring_payments_for_email ( $is_manual, $order ) {
	$billing_email = $order->get_billing_email();
	$email_string_to_look_for = 'email@bogdan.is';
	if ( false !== strpos( $billing_email, $email_string_to_look_for ) ) {
		$is_manual = false;
	}
	return $is_manual;
}