civicrm how to identify the php page

I want to edit civicrm custom form 开发者_运维技巧section.

I can not find the PHP page.

---

Check the CiviCRM Floss Book:

http://en.flossmanuals.net/civicrm/ch062_introduction

Also check:

http://wiki.civicrm.org/confluence/display/CRMDOC33/Customizing+CiviCRM+Screens

Finally might be better off posting this on the civicrm forums :)

lobo