PHP Principal File: You should produce a file known as ‘myhtmlblock.php’ inside this directory. This file will include the most crucial class of the module. Also Be sure that in each and each folder of the HTML Module, You will find there's file named ‘index.php’ getting down below code: searching https://www.presta-addons-modules.com/en/front-office/prestashop-products-extra-tabs.html