Subscription update callback for Recurring Payments EDD extension

edd_recurring_update_subscription.php

<?php

/***
Make API call if Recurring Payments subscription status has changed
**/

add_action( 'edd_recurring_update_subscription', 'drw_subscription_update_callback', 10, 1);

function drw_subscription_update_callback( $subscription_id = null ) {

	if ( null == $subscription_id ) return;

	$subscription = new EDD_Subscription( $subscription_id );

	$user_id = $subscription->customer->user_id;

	//'pending', 'active', 'cancelled', 'expired', 'failing', 'completed'

	$status = $subscription->get_status();

	if ( 'cancelled' || 'expired' == $status ) {

		// make API call

	} elseif( 'active' == $status ) {

		// make API call

	}
}