I don't understand Opencart 3?

Question

opencart

I can't understand
the parts of the site that are enclosed in colunm_left column_right are not displayed, I
generally fell into a stupor
on the main page, I display
<?php echo $column_left; ?>
I display in the scheme on the main html module with fishtext
there is nothing
what x .. zero on the ground?

Answer 1

Opencart 3 uses Twig templating engine, nothing can be output via echo, in view use {{ column_left }}
https://twig.symfony.com/