Opencart duplicate module example

2018-07-01 Sunday: how to duplicate handling fee module in Opencart

Overview

Want to add a fee similar to Opencart's default handling fee for ship-able orders. Free but technical way to do this is to duplicate files which implement the handling fee, making changes in them so they appear as a new Opencart module in Opencart's Extensions -> Order Totals admin page.

Locating Existing OC Module Files

Searching for handling fee related files in Opencart 2.3.0.2 root directory:

$ find . -name '*hand*'
./admin/view/template/extension/total/handling.tpl
./admin/language/en-gb/extension/total/handling.php
./admin/controller/extension/total/handling.php
./catalog/model/extension/total/handling.php
./catalog/language/en-gb/extension/total/handling.php

$

• https://forum.opencart.com/viewtopic.php?t=6696