Special character issue in twig

Question

I have try following code for custom block. it is working fine when I does add content from admin. but, just issue for special character.

admin\view\template\extension\module\theme_module.twig

<div class="tab-content">
                    {% for language in languages %}
                    <div id="tab8-language-{{ language.language_id }}" class="tab-pane">
                      <div class="form-group">
                        <div class="col-sm-10">
                        <textarea name="custom_block[{{ language.language_id }}][description]" data-toggle="summernote" data-lang="{{ summernote }}" class="form-control" id="input-description8{{ language.language_id }}">{{ custom_block[language.language_id].description ? custom_block[language.language_id].description }}</textarea>
                        </div>
                      </div>
                    </div>
                    {% endfor %}
                  </div>

admin\controller\extension\module\theme_module.php

if (isset($this->request->post['custom_block'])) {
            $data['custom_block'] = $this->request->post['custom_block'];
        } else {
            $data['custom_block'] = $this->config->get('custom_block');
}

catalog\controller\common\header.php

$data['config_language_id'] = $this->config->get('config_language_id');    
$data['custom_block'] = $this->config->get('custom_block');

catalog\view\theme\default\template\common\header.twig

{% set lang = config_language_id %}    
{% if custom_block[lang]['description'] %}
       {{ custom_block[lang]['description'] | convert_encoding('UTF-8', 'HTML-ENTITIES') }}
    {% endif %}

when I does add content something like from admin: ľščťžýáíé

So, does Output: ľšÄťžýáíé

Answer 1

The correct way is to do this in the controller file. For example in:

catalog\controller\product\category.php

Create your variable:

$data['my_var'] = html_entity_decode($data['my_var'][$this->config->get(‌​'config_language_id'‌​)]['description'], ENT_QUOTES, 'UTF-8');

And in catalog\view\theme\default\template\product\category.twig, echo it:

{{ my_var }}

Output:

ľščťžýáíé