hide-bundle-when-product-is-out-of-stock.php

//Hide the Bundle When a product is Out of Stock
add_filter( 'woocommerce_product_is_visible', 'hide_bundle_when_required_product_is_out_of_stock', 10, 2 );

function hide_bundle_when_required_product_is_out_of_stock( $visible, $product_id ) {
    $product = wc_get_product( $product_id );

    // Check if the product is a bundle
    if ( $product && $product->is_type( 'bundle' ) ) {
        $bundled_items = $product->get_bundled_items();

        // Loop through all bundled items
        foreach ( $bundled_items as $bundled_item ) {
            // Check if it's a required product
            if ( ! $bundled_item->is_optional() ) {
                $bundled_product = $bundled_item->get_product();

                // If the required product is out of stock, hide the bundle
                if ( $bundled_product && ! $bundled_product->is_in_stock() ) {
                    return false;
                }
            }
        }
    }

    return $visible;
}