如何通过要求客户提供先前购买的证明来防止在 WooCommerce 中未经授权购买特定产品？

对 WooCommerce 中防止未经授权的购买做出反应

问题：

商家面临着防止特定商品未经授权购买的常见挑战产品。在这种情况下，客户必须拥有产品“a”或“b”的先前购买证明才能访问产品“c”、“d”和“e”。

解决方案：

在本综合指南中，我们将为您提供自定义功能，在启用受限产品之前确定客户是否已购买必备产品

function has_bought_items() {
    $bought = false;

    // Replace the numbers with your specific target product IDs
    $prod_arr = array( '21', '67' );

    // Gather all customer orders
    $customer_orders = get_posts( array(
        'numberposts' => -1,
        'meta_key'    => '_customer_user',
        'meta_value'  => get_current_user_id(),
        'post_type'   => 'shop_order', // WooCommerce orders post type
        'post_status' => 'wc-completed' // Only orders with "completed" status
    ) );

    // Process each customer order
    foreach ( $customer_orders as $customer_order ) {
        // Handle WooCommerce version compatibility
        $order_id = method_exists( $order, 'get_id' ) ? $order->get_id() : $order->id;
        $order = wc_get_order( $customer_order );

        // Iterate through products bought in the order
        foreach ($order->get_items() as $item) {
            // Product ID retrieval based on WooCommerce version
            if ( version_compare( WC_VERSION, '3.0', '<' ) ) 
                $product_id = $item['product_id'];
            else
                $product_id = $item->get_product_id();

            // Condition: Check if required product ID exists in the array of purchased products
            if ( in_array( $product_id, $prod_arr ) ) 
                $bought = true;
        }
    }

    // Return true if the specific products have been purchased by the customer
    return $bought;
}

用法：

在 WooCommerce 模板中实现操作产品添加到购物车按钮的功能，例如：

• 商店的 Loop/add-to-cart.php页面
• 单个产品页面的单个产品/添加到购物车文件夹

例如，在商店页面的添加到购物车按钮模板中（循环/添加-to-cart.php):

// Replace numbers with restricted product IDs
$restricted_products = array( '20', '32', '75' );

// WooCommerce compatibility adjustment
$product_id = method_exists( $product, 'get_id' ) ? $product->get_id() : $product->id;

// Restricted product, inactive add-to-cart button
if ( !has_bought_items() && in_array( $product_id, $restricted_products ) ) { 

    // Display an inactive add-to-cart button with a custom message

// Non-restricted product or allowed product after specific purchase
} else { 

    // Regular add-to-cart button code
}

此示例动态禁用特定产品的添加到购物车按钮，直到客户事先证明购买所需物品。

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