Why can't I pass this variable to a Twig view?

Why can't I pass this variable to a Twig view? - Printable Version

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+--- Thread: Why can't I pass this variable to a Twig view? (/showthread.php?tid=77880)

Why can't I pass this variable to a Twig view? - Ajax30 - 10-30-2020

I am working on a online newspaper/blogging application with CodeIgniter 3.1.8 and Bootstrap 4. I have decided to add themes to it. The application is not HMVC, only MVC.

The themes directory is outside application as can be see in the image below:

Inside themes I have the theme directory (of course) which contains the "master view",

Code:
layout.php

How I use the theme views

In application/core I have added a MY_Loader.php file with the following contents:

Code:
<?php defined('BASEPATH') OR exit('No direct script access allowed');

class MY_Loader extends CI_Loader {

 function theme_view($folder, $view, $vars = array(), $return = FALSE) {

  $this->_ci_view_paths = array_merge($this->_ci_view_paths, array(FCPATH . $folder . '/' => TRUE));

   return $this->_ci_load(array(

    '_ci_view' => $view,

    '_ci_vars' => $this->_ci_prepare_view_vars($vars),

    '_ci_return' => $return

   ));

  }

}

In my Posts controller's index() method, I load the view passing it the data:

Code:
public function index() {

  //more code here

  $data['posts'] = $this->Posts_model->get_posts($config['limit'], $config['offset']);

  $this->load->theme_view('/themes/caminar/', 'layout', $data);

}

Using Twig for the themes

The next step was to add the [i]Twig[/i] template engine to the theme(s). For this purpose, I use CodeIgniter Simple and Secure Twig. I have:

Added the [i]Simple and Secure Twig[/i] library in application\libraries
In the third_party directory I have added Twig itself.
In application\config\autoload.php I have loaded twing:
$autoload['libraries'] = array('database', 'form_validation', 'session', 'user_agent', 'twig');
Set the path for the Twig views in application\libraries\Twig.php:

Code:
private $config = [ 'paths' => [FCPATH . '/themes', VIEWPATH], 'cache' => '/path/to/twig/cache', ];

The problem

According to the docs of CodeIgniter Simple and Secure Twig, we can set a global variable like so:

Code:
$this->twig->addGlobal('sitename', 'My Awesome Site');

So, I added

Code:
$this->twig->addGlobal('siteTitle', 'My Awesome Site');

in the Posts controller:

Code:
public function index() {

 //call initialization method

 $config = $this->_initPagination("/", $this->Posts_model->get_num_rows());

 $data = $this->Static_model->get_static_data();

 $data['pages'] = $this->Pages_model->get_pages();

 $data['categories'] = $this->Categories_model->get_categories(); 

 //use limit and offset returned by _initPaginator method

 $data['posts'] = $this->Posts_model->get_posts($config['limit'], $config['offset']);

 $this->twig->addGlobal('siteTitle', 'My Awesome Site');

 $this->load->theme_view('/themes/caminar/', 'layout', $data);

}

Yet, in themes\caminar\layout.php the line

Code:
<title>{{siteTitle}}</title>

does not display "My Awesome Site" inside the <title> tag.
What am I doing wrong?

RE: Why can't I pass this variable to a Twig view? - InsiteFX - 10-30-2020

I think it has something to do with the ThirdParty loading.

Read this may help you.

CodeIgniter: Access Third Party Libraries