<?php if (!defined('ABSPATH')) die('No direct access allowed'); //for woof_meta_get_keys method //another way is copy/paste! class WOOF_PDS_CPT extends WC_Product_Data_Store_CPT { public function get_internal_meta_keys() { $exception = array('_height', '_width', '_length', '_weight', 'total_sales', '_stock'); return array_diff($this->internal_meta_keys, $exception); } }