Debugging in PHP can be difficult because up until very recently (PHP 5.6) there have been no built in standard tools to debug your applications. This talk will start with the basic strategies of debugging in PHP with no tools and then examine available tools that you can use to debug. Some of the tools that I'll cover are Xdebug and phpdbg.

1. DEBUGGING IN PHP

2. “The most effective debugging tool is still careful
thought, coupled with judiciously placed print
statements.”
Brian W. Kernighan, in the paper Unix for Beginners (1979)

9. Stack Traces on Error Conditions
Maximum Nesting Protection
Code Coverage Analysis
Profiling
Remote Debugging
http://xdebug.org

10. Stack Traces on Error
Conditions

11. Maximum Nesting
Protection

12. Code Coverage Analysis

13. Profiling (qcachegrind)

14. Remote Debugging
(MacGDBp & Xdebug Helper)

15. Integrated into PHP 5.6 core
Not an extension
Better support coming soon
http://phpdbg.com/

16. Andrew Shell
http://blog.andrewshell.org
@andrewshell