Un language switcher Twig

Introduction

Définir les méthodes pour les URL

<?php

/**
 * Annotation method
 */

use Sensio\Bundle\FrameworkExtraBundle\Configuration\Method

/**
 * @Route("/new", name="application_new")
 * @Method("GET")
 * @Template()
 */
public function newAction($id)
{
    [...]
}

Template Twig du language switcher

<!-- _langueSwitcher.html.twig -->

{# If method is not GET the langue switcher is hidden to prevent change the url on a post action #}
{% if app.request.get('_route') and app.request.get('_method') and "GET" in app.request.get('_method').methods %}

{% set actualLangue = app.request.locale %}

{% set routeParams = app.request.get('_route_params') %}
<div class="langues">
  {% for langue in ['fr','en'] %} {# If you have a language referential you may call a controller to get all languages #}
  <div class="langue langue-{{langue}}">
   

    {% if actualLangue == langue %}
    <div class="langue-current langue-current-{{langue}}">
      <div class="flag flag-{{langue}}">
        <img src="{{ asset('bundles/imagbasecalls/images/'~langue~'.png') }}" alt="flag-{{langue}}"/>
      </div>
      <div class="iso">
        {{ langue|capitalize }}
      </div>
    </div>
    {% else %}

    {% if routeParams['_locale'] is defined %}
    {%set routeParams = routeParams|merge({'_locale': langue}) %}
    {% endif %}
    
    <div class="langue-available langue-available-{{langue}}">
      <div class="flag flag-{{langue}}">
        <a href="{{ path(app.request.get('_route'), routeParams) }}"><img src="{{ asset('bundles/imagbasecalls/images/'~langue~'.png') }}" alt="flag-{{langue}}"/></a>
      </div>
      <div class="iso">
        <a href="{{ path(app.request.get('_route'), routeParams) }}">{{ langue|capitalize }}</a>
      </div>
    </div>

    {% endif %}
  </div>
  {% endfor %}
  <div class="clear"></div>
</div>
{% endif %}

Inclure le language switcher

<!-- layout.html.twig --> 

{% block langue_switcher %}
    <div id="langue_switcher">
        {% include('IMAGBaseCallsBundle:Base:_langueSwitcher.html.twig') %}
    </div>
{% endblock langue_switcher %}

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{% set source_string = "/" ~ app.request.locale ~ "/" %}
{% for language in ['fr','en'] %}
    {% set target = "/" ~ language ~ "/" %}
    <div{% if language == app.request.locale %} class="selected"{% endif %}><a href="{{ app.request.requestUri|replace({(source): target}) }}">{{ language }}</a></div>
{% endfor %}