How to check which coupon is applied to which product in WooCommerce?

问题

Since we can apply different coupons to each product in an order, Is there any method to know which coupon is applied to which product? I've used $order->get_used_coupons() function but it just returns the used coupon codes only.

Please help with a solution. Thanks.

回答1:

Example made for Woocommerce 2.5.x on June 2016 (Will not work in Woocommerce 3+)

This example is based on compiled searches:

function wc_my_order_coupons( $order_id ) {
    $order = new WC_Order( $order_id );

    // checking if order has some used coupons
    if( sizeof($order->get_used_coupons()) > 0 ) {
        foreach( $order->get_used_coupons() as $coupon_code ) {

            // Retrieving the coupon ID
            $post_obj = get_page_by_title($coupon_code, OBJECT, 'shop_coupon');
            $coupon_id = $post_obj->ID;

            // here is a list of most all data that you can use for a coupon
            $cp_discount_type = get_post_meta( $coupon_id, 'discount_type', true );
            $cp_amount = get_post_meta( $coupon_id, 'coupon_amount', true );
            $cp_indiv_use = get_post_meta( $coupon_id, 'individual_use', true );
            $cp_products = get_post_meta( $coupon_id, 'product_ids' ); 
            $cp_excl_products = get_post_meta( $coupon_id, 'exclude_product_ids' );
            $cp_usage_limit = get_post_meta( $coupon_id, 'usage_limit', true );
            $cp_expiry_date = get_post_meta( $coupon_id, 'expiry_date', true );
            $cp_apply_before_tax = get_post_meta( $coupon_id, 'apply_before_tax', true );
            $cp_free_shipping = get_post_meta( $coupon_id, 'free_shipping', true ); 

            // Getting the products in this order_id
            $items = $order->get_items();
            foreach ($items as $key => $item) {
                $product_name = $item['name'];
                $product_id = $item['product_id'];

                // Example: we use product_ids authorized in the coupon $cp_products
                if (in_array($product_id, $cp_products)) {
                    echo $product_name . 'uses the coupon: ' . $coupon->code . '<br>';
                }
            }
        }
    }
}

References :

Class WC_Coupon methods and properties
WC ApiDocs - class WC_Coupon source
Create a coupon programatically
Send coupons used in an order by email
Display coupon description woocommerce

来源：https://stackoverflow.com/questions/37760588/how-to-check-which-coupon-is-applied-to-which-product-in-woocommerce

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php

wordpress

woocommerce

product

coupon