Php 基于常规价格值禁用商业产品

在我的Woocommerce网站上，我有一个插件，它有时会将产品价格更改为常规价格=null（出于不同的原因）

---

当这种情况发生时，我们希望禁用该产品，使其不会显示在我们的在线商店中。我们如何在functions.php中做到这一点？

当常规价格为

NULL

时，此代码将禁用目录和搜索中的产品，当常规价格不再为

NULL

时，将重新启用禁用的产品：

add_action( 'init', 'action_on_product_reg_price' );
function action_on_product_reg_price(){
    global $wpdb;

    // First query: Get the product Ids that have a NULL regular price
    $product_ids = $wpdb->get_col( "
        SELECT DISTINCT pm.post_id as product_id
        FROM  {$wpdb->prefix}postmeta as pm
        LEFT JOIN {$wpdb->prefix}postmeta AS pm2 ON pm2.post_id = pm.post_id
        WHERE (pm.meta_key = '_regular_price'
        AND (pm.meta_value IS NULL
        OR pm.meta_value LIKE 'null'))
        OR (pm2.meta_key LIKE '_force_visibility'
        AND pm2.meta_value IS NOT NULL)
    " );

    // Disable the products from catalog and search
    if(count($product_ids) > 0){
        foreach($product_ids as $product_id){
            $product = wc_get_product($product_id);
            if($product->get_catalog_visibility() != 'hidden' ) {
                $product->set_catalog_visibility('hidden'); // visible
                $product->save();
                update_post_meta( $product_id, '_force_visibility', 1 );
            }
        }
    }

    // 2nd query: Get the product Ids that have changed from NULL regular price
    $product_ids = $wpdb->get_col( "
        SELECT DISTINCT pm.post_id as product_id
        FROM  {$wpdb->prefix}postmeta as pm
        INNER JOIN {$wpdb->prefix}postmeta AS pm2 ON pm2.post_id = pm.post_id
        WHERE pm.meta_key = '_regular_price'
        AND (pm.meta_value IS NOT NULL
        OR pm.meta_value NOT LIKE 'null')
        AND pm2.meta_key LIKE '_force_visibility'
        AND pm2.meta_value = '1'
    " );

    // Re-enable catolog and search visibility
    if(count($product_ids) > 0){
        foreach($product_ids as $product_id){
            $product = wc_get_product($product_id);
            if($product->get_catalog_visibility() != 'visible' ) {
                $product->set_catalog_visibility('visible'); // visible
                $product->save();
                update_post_meta( $product_id, '_force_visibility', NULL );
            }
        }
    }
}

代码位于活动子主题（或主题）的function.php文件或任何插件文件中

在WooCommerce 3上测试并工作+