title: Plugin Architecture in PHP
body: <p>I am planning on doing a research on how to implement a plug-in architecture in PHP. I have tried searching the web for possible references, but I thought that maybe my search for a good reference would be faster and more relevant if I asked here.</p>
  
  <p>Has anyone here tried using plug-in architecture for web projects?</p>
  
  <p>Thanks,
  Erwin</p>