small php commercial grade open source project. Suggestions?
<p>Hey guys, I'm learning PHP and I would like to have a look at the source code of a small "commercial grade" PHP project.</p>

<p>Why small? Well because I'm a beginner and big projects such as Drupal or Wordpress are overwhelming right now, aka I don't understand a lot.</p>

<p>Why "commercial grade"? I would like to see if things are done in a different way in comparison to theory, courses and books.</p>

<p>Thanks for any suggestion!</p>
