opencart 3.0.2 - How to convert older 2.x templates from tpl to twig

Converting the template from tpl to twig is somewhat easy to do.

Download "php2twig" slightly modified (click here), on the fly, to have a working recursive file conversion (recursive glob function from php.net comments).
The original source code can be found here: https://github.com/makinacorpus/php-twig-converter

Copy php2twig in your theme folder (suggested).

Go in your theme folder and run the following command:

(windows)
php.exe php2twig -e .tpl -ne .twig -r "c:/fullpath/to/template"

(linux)
./php2twig -e .tpl -ne .twig -r /fullpath/to/template



Save the output of php2twig to verify eventual problems.
For sure the bulk work is mostly done by this useful script

Note: the script doesn't convert correctly the {% endfor %}.