title: how to use an original app class in a helper class like DB or Auth on laravel 4
body: <p>I create an helper class where I put some functions. It works fine till I use an other class on it:</p>
  
  <pre><code>namespace Helpers;
  class Helper {
      public static function helloWorld()
      {
          return 'Hello World';
      }
      public static function accessPermission($role, $filtre)
      {
          $jointure_session = DB::table('jointure_session')
          -&gt;where('session_type',$role)
          -&gt;where($filtre,1)
          -&gt;get();
          foreach ($jointure_session as $value_jointure_session) {
              return 'Allow '.$filtre;
          }
      }
  }
  </code></pre>
  
  <p>I have an error because the DB class is not found. </p>
  
  <blockquote>
    <p>Symfony \ Component \ Debug \ Exception \ FatalErrorException
    Class 'Helpers\DB' not found</p>
  </blockquote>
  
  <p>Any Idea?
  Thank you in advance.</p>