在订单视图列WooCommerce中显示自定义字段值

// 添加自定义字段
add_action('woocommerce_admin_order_data_after_billing_address', 'add_custom_field_to_order');
function add_custom_field_to_order($order){
    echo '<p><strong>自定义字段:</strong> ' . get_post_meta($order->get_id(), '_custom_field', true) . '</p>';
}

// 保存自定义字段的值
add_action('woocommerce_process_shop_order_meta', 'save_custom_field_value');
function save_custom_field_value($order_id){
    $custom_field_value = isset($_POST['_custom_field']) ? sanitize_text_field($_POST['_custom_field']) : '';
    update_post_meta($order_id, '_custom_field', $custom_field_value);
}

// 在订单视图列中显示自定义字段的值
add_filter('manage_edit-shop_order_columns', 'add_custom_field_to_order_column');
function add_custom_field_to_order_column($columns){
    $new_columns = array();

    foreach ($columns as $column_name => $column_info) {
        $new_columns[$column_name] = $column_info;

        // 在"订单总金额"列后添加新列
        if ('order_total' === $column_name) {
            $new_columns['custom_field'] = __('自定义字段', 'woocommerce');
        }
    }

    return $new_columns;
}

add_action('manage_shop_order_posts_custom_column', 'add_custom_field_value_to_order_column');
function add_custom_field_value_to_order_column($column){
    global $post;

    if ('custom_field' === $column) {
        $order = wc_get_order($post->ID);

        // 获取自定义字段的值
        $custom_field_value = get_post_meta($order->get_id(), '_custom_field', true);

        // 显示自定义字段的值
        echo $custom_field_value;
    }
}