Code-Snippets-Functions/Execute a function on a child site/Yoast SEO/no-index-hidden-woocommerce-products.txt

add_filter( 'wpseo_sitemap_entry', 'wc_remove_hidden_products', 99, 3);
function wc_remove_hidden_products($url, $type, $post) {
	if($post->post_type == 'product' && is_object_in_term( $post->ID, 'product_visibility', 'exclude-from-catalog')){
		return '';
	}
	return $url;
}

add_filter('wpseo_robots', 'wc_noindex_hidden_products', 10, 2);
function wc_noindex_hidden_products($robots, $indexable) {
	
	if(!isset($indexable->model)) {
		return $robots;
	}

	if(!isset($indexable->model->object_id)) {
		return $robots;
	}
	
	if(is_object_in_term( $indexable->model->object_id, 'product_visibility', 'exclude-from-catalog')){
		$robots = 'noindex, nofollow';

	}
	return $robots;
}