This plugin hasn’t been tested with the latest 3 major releases of WordPress. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.

Ultimate DebugBar

Description

Ultimate debug bar for your WordPress website. On each page of your website a neat debug bar will be displayed with the following info:

  • PHP version
  • Request execution time
  • Request memory consumption
  • WordPress-related PHP constants defined in your wp-config.php file
  • All website options (wp_options)
  • Request data
  • Timeline (waterfall) where you can see which portion of execution takes too much time
  • List of all hooks triggered on the page whose execution time exceeds 1ms, along with some stats
  • List of all database queries performed on the page, along with their source and execution time
  • Last 100 lines of your debug.log file (if it exists in wp-content)
  • List of loaded PHP files (categorized)

Besides that, it will track request data/hooks/db queries/mem. consumption in AJAX calls too (beta).

This plugin is meant to be used during development and/or debugging only. Only administrators and network administrators (in multi-site environment) can see the debugbar, unless the WP_DEBUG is set to true. In that case, everyone will see the debugbar.

Try it instantly on tastewp.com!

Screenshots

  • List of all database queries with their timings
  • List of (slow) hooks lasting over 1ms in an AJAX request
  • Deserialized/formatted config options
  • Timeline (waterfall) of WP execution (TTFB)

Installation

Use built in plugin installer or unzip ultimate-debugbar.zip in your wp-content/plugins and activate the plugin through the dashboard.

FAQ

Q: AJAX requests are not working when plugin is active
A: Your server is blocking Ultimate Debugbar. If you’re running nginx, (check this)[https://stackoverflow.com/questions/23844761/upstream-sent-too-big-header-while-reading-response-header-from-upstream].

Q: AJAX requests are not being diplayed in the debugbar
A: Plugin is trying to send too much data in the headers. I’m afraid there’s no solution for this yet.

Q: How do I disable tracking AJAX requests?
A: Add the following code to your wp-config.php:

define('ULTIMATE_DEBUG_AJAX', false);

Reviews

September 19, 2022
This plugin seemed to work fine for me. I wish the timeline 'Rendering' was broken down somehow with more granularity. I have always wished for a tway to tell which crappy plugin is burning up all the time to render a page.
June 7, 2022 1 reply
I don't understand why this fine little plugin doesn't have much more fans. It integrates nicely at the bottom edge of your site-display, offering some KPI at all times, ready to be popped open when more information is needed. Its waterfall diagram (titled "Timeline") helped me zoom in on a troublemaker in matter of moments; much more intuitive than quite a few alternatives I have tried before. Thank you, @Avram; may this live long and gain the audience it deserves.
Read all 3 reviews

Contributors & Developers

“Ultimate DebugBar” is open source software. The following people have contributed to this plugin.

Contributors

Translate “Ultimate DebugBar” into your language.

Interested in development?

Browse the code, check out the SVN repository, or subscribe to the development log by RSS.

Changelog

0.2
– updated debugbar (requires PHP 7.1 now)
– added plugin icon

0.1
– initial release