title: Laravel Tinker Not Working After Upgrading From 5.3 To 5.4
body: <p>I recently upgrade Laravel 5.3 to Laravel 5.4. I had read the upgrade guide provided by the laravel, and everything looks good. Until I try to run the Laravel Tinker and it's not working. I already followed the upgrade guide specifically for Laravel Tinker part.</p>
  
  <blockquote>
    <p>Laravel Tinker</p>
    
    <p>In order to continue using the tinker Artisan command, you should also
    install the laravel/tinker package:</p>
    
    <p>composer require laravel/tinker</p>
    
    <p>Once the package has been installed, you should add
    Laravel\Tinker\TinkerServiceProvider::class to the providers array in
    your config/app.php configuration file.</p>
  </blockquote>
  
  <p>Source: <a href="https://laravel.com/docs/5.4/upgrade" rel="noreferrer">https://laravel.com/docs/5.4/upgrade</a></p>
  
  <p>And here is my config/app.php :</p>
  
  <pre><code>'providers' =&gt; [
  
          /*
           * Laravel Framework Service Providers...
           */
          Laravel\Tinker\TinkerServiceProvider::class,
  </code></pre>
  
  <p>But then, when I ran the command "php artisan tinker", it says this:</p>
  
  <pre><code> [Symfony\Component\Console\Exception\CommandNotFoundException]
    Command "tinker" is not defined.
  </code></pre>
  
  <p>Has anybody experienced this before? </p>
  
  <p>Note: other artisan command works perfectly and I can see my site just fine.</p>