php - WooCommerce 订阅 - 检查产品是否已有活跃订阅者

Question

我正在使用“WooCommerce 订阅”插件，我想检查该产品是否已经在系统中拥有活跃订阅者

我只希望每个产品有 1 个订阅者。有一个过滤器可以用来检查它，但我不知道如何使用它:
https://docs.woocommerce.com/document/subscriptions/develop/filter-reference/

我如何使用该函数或 Hook 来实现这一点？

谢谢

Answer 1

如果订阅产品已被订阅者主动使用，此自定义条件函数将返回 true。

function has_an_active_subscriber( $product_id = null ){

    // Empty array to store ALL existing Subscription PRODUCTS
    $products_arr = array();


    $products_subscr = get_posts( array(
        'numberposts' => -1,
        'post_status' => 'publish',
        'post_type'   => array( 'product', 'product_variation' ),
        'meta_key' => '_subscription_price',
    ) );
    foreach( $products_subscr as $prod_subs ) {
        $products_arr[] = $prod_subs->ID;
    }

    // Testing if current product is a subscription product
    if (in_array( $product_id, $products_arr) ){

        // Declaring empties arrays
        $subscribers_arr = array(); // ALL subscribers IDS
        $active_subscriptions_arr = array(); // ALL actives subscriptions
        $active_subscription_products_arr = array(); // ALL actif subscription products IDS IDS
        $subscriber_subscriptions = array();

        // Getting arrays of "active" IDS for subscribers, subscriptions orders and subscription products
        $subscribers = get_users( array( 'role' => 'subscriber') );
        foreach( $subscribers as $subscriber ) {
            $subscriber_arr[] = $subscriber->ID;
            $subscriptions = wcs_get_users_subscriptions($subscriber->ID);
            foreach ($subscriptions as  $key => $subscription ){
                $subscription_status = $subscription->post->post_status;
                if ( $subscription_status == 'wc-active' ) { // active subscriptions only
                    $subscription_id = $subscription->post->ID;
                    $order_id = $subscription->order->post->ID; // order ID (corresponding to the subscription ID)
                    $active_subscriptions_arr[] = $subscription->post->ID;
                    $order_items = $subscription->order->get_items();
                    // Getting all the products in the Order
                    foreach ( $order_items as $item ) {
                        // $item_id = $item[product_id];

                        // Avoiding to add existing products in the array 
                        if( !in_array( $product_id, $active_subscription_products_arr ))
                            $active_subscription_products_arr[] = $item[product_id];
                    }
                }
            }
        }
    }
    if (in_array( $product_id, $active_subscription_products_arr ) ) return true;
    else return false;
}

此代码位于您的事件子主题(或主题)的 function.php 或任何插件文件中。

我刚刚在此处使用了 wcs_get_users_subscriptions() native 订阅函数，以在我的代码中获取已定义用户 ID 的订阅。

---

USAGE (for a defined $product_id variable)

If ( has_an_active_subscriber( $product->id ) ) { // or $product_id
    // This product is already used by an active subscriber
    // DO SOMETHING HERE
} else {
    // This product is NOT used
    // DO SOMETHING HERE
}

You can also replace $product_id by a product ID here for example if the ID of the product is 124):

If ( has_an_active_subscriber( 124 ) )  //do something

You can use this conditional function particularly, on add-to-cart (subscription) templates (that you will have to copy from the subscription plugin templates folder to your active theme's woocommerce template folder…)

所有代码都经过测试且功能齐全

引用资料:

• Template Structure + Overriding Templates via a Theme
• WooCommerce Subscriptions developper docs