- Xdebug Proficiency: Mandatory session. Conditional breakpoints, stack traces, and variable watching.
- Profiling Tools: Using Blackfire/XHProf to identify "why is this page slow?"
- Log Analysis: Reading
dblogand server logs to reconstruct a crash. - The "Break It" Lab: I will intentionally break the site. You must use Xdebug to find the line of code and fix it live.