title: Wordpress Plugin to identify what php code a page use
body: <p>I'm looking a plugin that allow me to know/identify when I am in a page the php classes used in that page.</p>
  
  <p>For example, a page can be part of a plugin or a part of a template,
  so if I have to change it how can I know where I need to change the code among the many php classes?</p>
  
  <p>Thanks so much</p>