1. Jonathan Bossenger
Let’s Code
Learn.WordPress.org
Debugging in WordPress

2. 2
👋🏽
Welcome!
As you join, please make sure you have your local
development environment ready:
• A local WordPress installation
• A code editor like VSCode or Sublime
• https://github.com/jonathanbossenger/wp-learn-
debugging/releases/download/1.0.0/wp-learn-
debugging.1.0.0.zip
Then, let everyone know in the chat where you’re joining
us from…
Hello!
○ My name is Jonathan Bossenger
○ From Cape Town, South Africa
○ Developer educator at Automattic
○ Sponsored to work with the Training Team
○ jonathanbossenger.com

3. Learn.WordPress.org
Debugging in
WordPress
Jonathan Bossenger

4. Announcements
○ Welcome, and thanks to Meagan for co-hosting.
○ Please let me know if you can’t see this slide!
○ We are presenting in focus mode, but please feel free to enable your video.
○ You are welcome to ask questions.
○ You are welcome to post questions in the chat, or unmute to ask questions.

5. Announcements
○ Make sure your local install is ready
• https://github.com/jonathanbossenger/wp-learn-
debugging/releases/download/1.0.0/wp-learn-debugging.1.0.0.zip
• https://www.howtogeek.com/789559/how-to-stop-safari-from-automatically-
unzipping-downloaded-files-on-mac/
○ If I am going too fast, please let me know!
○ We will be posting this session to https://wordpress.tv/ afterwards
○ For more WordPress focused content please visit https://learn.wordpress.org/

6. Learning Outcomes
1. Enabling the WordPress debug constants
• WP_DEBUG
• WP_DEBUG_DISPLAY
• WP_DEBUG_LOG
• SCRIPT_DEBUG
• SAVEQUERIES
2. Debugging plugins
• Debug Bar
• Query Monitor

7. Learning Outcomes
1. Additional tools
• Ray
• Xdebug

8. Let’s code.

9. Resources
○ https://github.com/jonathanbossenger/wp-learn-debugging/releases/download/1.0.0/wp-learn-
debugging.1.0.0.zip
○ https://wordpress.org/documentation/article/debugging-in-wordpress/
○ https://wordpress.org/plugins/debug-bar/
○ https://wordpress.org/plugins/query-monitor/
○ https://wordpress.org/plugins/spatie-ray/
○ https://xdebug.org/
○ https://learnxdebug.com/