How can I get the user to switch languages ​​in Laravel 5?

Option 1:

• Store custom language in database, I have mine in users table. This is to avoid asking the user every time they log into your application. You can set 'en' as default. However, if the user is a guest, we keep the locale in the session.

So your migration might look like this:

<?php

use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class CreateUsersTable extends Migration {

    /**
     * Run the migrations.
     * @return void
     */
    public function up()
    {
        Schema::create('users', function(Blueprint $table)
        {
            $table->increments('id');
            $table->string('email')->unique();
            $table->string('password', 60);
            $table->string('locale', 5)->default('en');
            $table->rememberToken();
            $table->timestamps();
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::drop('users');
    }

}

      

        
        
        
      

    

2. When a user or guest clicks on a specific language link, update the user's locale in the database, or save the guest's selection in the session

Example: For an authenticated user or guest in a controller

public function setLocale($locale){
 if(Auth::check()){
     $user = User::find(Auth::user()->id);
     $user->update(['locale'=>$locale]);
  }else{
    Session::put('locale',$locale);
  }
}

      

        
        
        
      

    

3. We need to find a way to set the language for each request because Laravel does not store a set of locales with App::setLocale()
   
   , so we will use a setLocale middleware for each request.

To understand how Laravel handles App::setLocale()

, here is a method in Illuminate \ Foundation \ Application.php that handles the locale setting

    public function setLocale($locale)
    {
        $this['config']->set('app.locale', $locale);

        $this['translator']->setLocale($locale);

        $this['events']->fire('locale.changed', array($locale));
    }

      

        
        
        
      

    

This method calls another method in Translator.php below:

/**
     * Set the default locale.
     *
     * @param  string  $locale
     * @return void
     */
    public function setLocale($locale)
    {
        $this->locale = $locale;
    }

      

        
        
        
      

    

As you can see, caching or session is used to remember the language, so we have to set it for every request. So let's create a Middleware for it. I'll call it LocaleMiddleware.

<?php namespace App\Http\Middleware;

use Closure, Session, Auth;

class LocaleMiddleware {


    public function handle($request, Closure $next)
    {
        if(Auth::user()){
            app()->setLocale(Auth::user()->locale);
        }elseif($locale = Session::has('locale')){
            app()->setLocale($locale);
        }


        return $next($request);
    }

}

      

        
        
        
      

    

4. Allows you to install middleware for each request by adding it to the middleware stack in app \ Http \ Kernel.php

protected $middleware = [ 'Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode', 'Illuminate\Cookie\Middleware\EncryptCookies', 'Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse', 'Illuminate\Session\Middleware\StartSession', 'Illuminate\View\Middleware\ShareErrorsFromSession', 'App\Http\Middleware\VerifyCsrfToken', 'App\Http\Middleware\LocaleMiddleware' ];