Sends the discount code used to Zapier on the After Checkout trigger.

my_pmproz_after_checkout_data_discount_code.php

<?php

// Copy from below here...

/**
 * Sends the discount code used to Zapier on the After Checkout trigger.
 * 
 * You can add this recipe to your site by creating a custom plugin
 * or using the Code Snippets plugin available for free in the WordPress repository.
 * Read this companion article for step-by-step directions on either method.
 * https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */
 function my_pmproz_after_checkout_data_discount_code( $data, $user_id, $level, $order ) {
	$discount_code = $order->getDiscountCode( true );
	$data['discount_code'] = empty( $discount_code->code ) ? '' : $discount_code->code;
	return $data;
}
add_filter( 'pmproz_after_checkout_data', 'my_pmproz_after_checkout_data_discount_code', 10, 4 );