10 Steps to properly do PHP Bug Tracking and Fixing as Fast as possible- Log watcher package blog

Question

1. Test as Much as Possible Before in your Development Environment
2. Test in a Staging server Before you Send it to the Production Server
3. Separate your Code from Environment Configuration files
4. Use a Version Control System to Maintain Project files, Except Configuration files
5. Track PHP Errors with Assertion Condition Tests
and other step in:
www.phpclasses.org/blog/package/1351/post/1-10-Steps-to-properly-do-PHP-Bug-Tracking-and-Fixing-as-Fast-as-possible.html

Answer 1

And use PHPUnit