How to insert txt file content into twig template - php

Question

Triyng to start opencart shop at first time
At the root of the site I have the file "file.ssi"
How to insert its contents into a twig template? (header.twig)
Why is it important that the file must be at the root and called file.ssi -- I have a script that periodically changes the contents of this file at many of my sites, and on static html sites or wordpress I print content of file.ssi into template with SSI, and how to do it on twig I don't understand
I tried write in header.twig
{{ bla_bla }}
then in catalog\controller\common\header.php
$data['bla_bla'] = sprintf($this->language->get('text_bla_bla'), $this->config->get('config_name'), date('Y', time()));
then in catalog\language\ru-ru\common\header.php
$_['text_bla_bla'] = 'my html code 1';
and this html code prints on the right place.
But when I tried to do something like this
$_['text_bla_bla'] = 'my html code 1' . $bla_bla_bla = file_get_contents('/file.ssi');
echo $bla_bla_bla; . 'my html code 2';
site doesn't even open
I understand the pure php error and my modest knowledge (or rather un-knowledge) php is not enough to get in $ _ ['text_bla_bla'] a couple of pieces of html and the contents of the file between them.
In general, I need to insert something in header.twig, or to solve it somehow with php, I myself do not understand where it was wrong.

Answer 1

This works!
in controller
$data['mydata'] = file_get_contents($path);
in template
{{ mydata }}

Answer 2

It would look like this:
Controller:
$text = file_get_contents($path);
return $this->render('page.html.twig', [
'text' => $text,
]);
Then in your twig template:
{{ text }}

Answer 3

bad syntax:
$_['text_bla_bla'] = 'my html code 1' . $bla_bla_bla = file_get_contents('/file.ssi');
echo $bla_bla_bla; . 'my html code 2';
If you need to use sprinf so in language file you can get this data $this->config->get('config_name'), date('Y', time() using %s %d
$_['text_bla_bla'] = 'my html code 1 %s %d';