title: Laravel 4.1 - Enable debug at runtime
body: <p>I'm using Laravel 4.1 to write an application. For some reason I need to disable debug in all environments including production, but I need to provide a means for users to be able to enable debug mode without editing configuration files (app.php) whenever needed (that means at runtime)  </p>
  
  <p>Is there a way to do so? I tried to change debug settings in App::before but that does not seem to be the correct solution (exception handlers are already registered at that point)  </p>
  
  <p><strong>Update:</strong><br>
  In last paragraph I said </p>
  
  <blockquote>
    <p>exception handlers are already registered at that point  </p>
  </blockquote>
  
  <p>This comment is misleading I think. Exception handlers should be registered anyway.<br>
  The actual problem I need to solve is: How to change which displayer (plainDisplayer or debugDisplayer) to use?  </p>
  
  <p>This decision is made at runtime (whenever an exception actually occures) based on value of a variable ($debug) in Illuminate\Exception\Handler  </p>
  
  <p>Calling <code>app('exception')-&gt;setDebug(true)</code> makes exception handler to use debug displayer but I'm not sure if this is the correct way to do it, specially if I'm going to put this code in App::before filter</p>