title: Laravel 5 maintenance mode turn on without artisan
body: <p>Is there any possibility to turn on and turn off Laravel 5 maintenance without php artisan up and down commands when my website is being hosted ?</p>
  
  <p>What I've done: </p>
  
  <pre><code>Route::get('site/shutdown', function(){
      return Artisan::call('down');
  });
  
  Route::get('site/live', function(){
      return Artisan::call('up');
  }); 
  </code></pre>
  
  <p>The first route is working fine. But when I call site/live the site still is shuted down. What can cause this problem ? </p>