Woocommerce custom fields won't update when I leave them empty and still displays empty fields
I added a custom field to a single product page for woocommerce in order to show ISBN number for the books I sell. I found a nice guide and managed to add everything as I want. However when I empty the custom field for ISBN it won't go empty on the site. I have the following code in the functions.php // Display Fields add_action( 'woocommerce_product_options_general_product_data', 'woo_add_custom_general_fields' ); // Save Fields add_action( 'woocommerce_process_product_meta', 'woo_add_custom_general_fields_save' ); function woo_add_custom_general_fields() { global $woocommerce, $post; echo '