Hide product SKU to guest customers

In some cases it is possible that you need to hide the identifier (SKU) of the products in your e-commerce catalog to guest customers and want to display it only if a customer is registered and logged in.

To do this, edit functions.php file that you find in your site’s FTP space in:

 wp-content/themes/{YOUR_ACTIVE_THEME}/functions.php

and insert this code:

// Hide product SKU
add_filter( 'wc_product_sku_enabled', function ( $enabled ) {
    if ( is_user_logged_in() ) {
        return true;
    }
    return false;
} );