Ivelina Dimova - The Magic of Advanced Debugging

As lead of the Ongoing Client Support at CrowdFavorite I’ve worked with lots of legacy code on different projects. This session covers some of the lessons we’ve learned in the process and tips how to deal with the most common issues faster and more effective. It also shows how the legacy code can be actually fun.

Transcript

1. The Magic of Advanced Debugging
3. Work Days
5. Once upon a time
8. Where to start
9. Don’t ever debug on production
10. Set debug constants
13. Fatal error: Cannot use object of type stdClass as array in /Users/ivdimova/Sites/project.dev/wordpress/wp-content/plugin s/custom-social-feed/includes/init.php on line 645, referer: http://project.dev/
14. Invalid argument supplied for foreach() in /Users/ivdimova/Sites/project.dev/wp-includes/plugin.php on line 523
15. Plugin conflicts?!
16. Grep all the things grep all the things
17. var_dump(); error_log(); error_log( print_r( $object, 1 ) );
18. Query Monitor
20. Xdebug
26. Permissions, permissions
27. Version Control
28. git log
29. git blame
31. Identify filters and hooks
32. add_action( 'plugins_loaded', 'prefix_remove_action', 10 ); function prefix_remove_action() { $invoice = new WC_Gateway_Sprout_Invoices(); $result = remove_action( 'woocommerce_thankyou_sprout_invoices', array( $invoice, 'thankyou_page' ), 20 ); }
36. Leave legacy for others
38. Contact: iv.dimova@gmail.com @iv_wp https://www.linkedin.com/in/ivdimova