The PrestaShop override mechanism make it easy to add fields to admin area lists without changing the core code. For example, to add lookup by Invoice #, Phone Number, and Postal Code to the orders list in the PresaShop Admin area, I only had to create the following file: /override/controllers/admin/AdminOrdersController.php
NOTE: Be sure to delete /cache/class_index.php after adding your new class!
<?php class AdminOrdersController extends AdminOrdersControllerCore { public function __construct() { parent::__construct(); $this->fields_list['invoice_number'] = array( 'title' => $this->l('Invoice #'), 'align' => 'text-center', 'class' => 'fixed-width-xs' ); $this->fields_list['phone_mobile'] = array( 'title' => $this->l('Phone Number') ); $this->fields_list['postcode'] = array( 'title' => $this->l('Zip/Postal code') ); } }