[Add Coupons To Order And Email] #woocommerce #wordpress

functions.php

add_filter( 'woocommerce_get_order_item_totals', 'add_coupons_codes_line_to_order_totals_lines', 10, 3 );
function add_coupons_codes_line_to_order_totals_lines( $total_rows, $order, $tax_display ) {
    // Exit if there is no coupons applied
    if( sizeof( $order->get_used_coupons() ) == 0 )
        return $total_rows;

    $new_total_rows = []; // Initializing

    foreach($total_rows as $key => $total ){
        $new_total_rows[$key] = $total;

        if( $key == 'discount' ){
            // Get applied coupons
            $applied_coupons = $order->get_used_coupons();
            // Insert applied coupon codes in total lines after discount line
            $coupons = array();
			foreach($applied_coupons as $coupon) {
				if (strpos($coupon, 'wc_points_redemption') !== false) {
					array_push($coupons, 'Point Discount');
				} else {
					array_push($coupons, $coupon);
				}
			}
             
            $new_total_rows['coupon_codes'] = array(
                'label' => __('Applied coupons:', 'woocommerce'),
                'value' => implode( ', ', $coupons ),
            );
        }
    }

    return $new_total_rows;
}