将适用的优惠券描述添加到WooCommerce管理员电子邮件通知

/**
 * 在WooCommerce管理员电子邮件通知中添加适用的优惠券描述
 */
function add_coupon_description_to_admin_email( $message, $order ) {
    $coupons = $order->get_used_coupons(); // 获取订单中使用的优惠券
    
    if ( ! empty( $coupons ) ) {
        $coupon_descriptions = array();
        
        foreach ( $coupons as $coupon_code ) {
            $coupon = new WC_Coupon( $coupon_code );
            $coupon_description = $coupon->get_description(); // 获取优惠券描述
            
            if ( ! empty( $coupon_description ) ) {
                $coupon_descriptions[] = $coupon_description;
            }
        }
        
        if ( ! empty( $coupon_descriptions ) ) {
            $coupon_text = implode( "\n", $coupon_descriptions );
            $message .= "\n\n适用的优惠券描述：\n" . $coupon_text;
        }
    }
    
    return $message;
}
add_filter( 'woocommerce_email_order_meta', 'add_coupon_description_to_admin_email', 10, 2 );