Debug Bar Constants
Debug Bar Constants adds three new panels to the Debug Bar that display the defined constants available to you as a developer for the current request:
Consider an alternative
Debug Bar Constants shows warning signs in 2026 — compare the alternatives below before installing. It runs on 20+ sites, is rated 5/5 and was last updated 9 years ago, and scores 31/100 on our health check.
- Small user base (20+ active installs)
- Very few reviews so far
- No update in 8 years
- Only tested up to WordPress 4.9 (latest is 7.1)
How does it stack up?
Side-by-side on installs, updates, ratings & support
Daily downloads
Download spikes usually follow a new release — each site that auto-updates counts as a download.
Rankings
Where Debug Bar Constants stands todayWordPress.org search rankings
Live position in the plugin search, top 100| Keyword | Position |
|---|---|
| Constants | >100 |
| debug bar | >100 |
| Debug Bar Constants | >100 |
| debugbar | #5 |
Version adoption
Share of active sites per release.
Rating breakdown
★★★★★★★★★★ 5 from 1 reviews
About Debug Bar Constants
From the official readme · v2.0.0Description
Debug Bar Constants adds three new panels to the Debug Bar that display the defined constants available to you as a developer for the current request:
- WP Constants
- WP Class Constants
- PHP Constants
Important
This plugin requires the Debug Bar plugin to be installed and activated.
Also note that this plugin should be used solely for debugging and/or in a development environment and is not intended for use on a production site.
If you like this plugin, please rate and/or review it. If you have ideas on how to make the plugin even better or if you have found any bugs, please report these in the Support Forum or in the GitHub repository.
Installation
- Install Debug Bar if not already installed (https://wordpress.org/plugins/debug-bar/).
- Extract the .zip file for this plugin and upload its contents to the
/wp-content/plugins/directory. Alternatively, you can install directly from the Plugin directory within your WordPress Install. - Activate the plugin through the “Plugins” menu in WordPress.
Don’t use this plugin on a live site. This plugin is only intended to be used for development purposes.
Changelog
Updated PHP Classes list for PHP7.
2.0.0
Release date: 2018-01-22
- Improved compatibility with PHP 7.2.
- Improved compatibility with the upcoming v 0.10.0 of the Debug Bar plugin.
- I18n/I10n: Improved text strings for localization.
- Updated the pretty print dependency to v1.8.0.
- Refactoring of part of the code base. No functional changes.
- General housekeeping.
- Added minimum PHP requirement header. (PHP 5.2.4, in line with WP itself.)
- Tested & found compatible WP 4.9.
1.7.0
Release date: 2017-07-10
- Improved usability of the admin notice in case the Debug Bar plugin is not active.
- The plugin will now add itself to the list of “recently active” plugins if it self-deactivates bcause the Debug Bar plugin is not active.
- Defer to just in time loading of translations for WP > 4.5.
- Updated the pretty print dependency to v1.7.0.
- Minor housekeeping.
- The minimum supported WP version is now 3.4, in line with the 0.9 version of the Debug Bar.
- Tested & found compatible WP 4.8.
1.6.1
Release date: 2016-04-15
- Get the leaner loading of text domains right (at last).
1.6.0
Release date: 2016-04-12
- Hard-coded the text domains for compatibility with GlotPress.
- Make loading of text-domain compatible with use of the plugin in the
must-useplugins directory. - Updated the pretty print class to v1.6.0.
- Minor housekeeping.
- Tested & found compatible WP 4.5.
1.5.0.3
Release date: 2016-01-13
- Fix very minor layout inconsistency in combination with Twenty-Sixteen theme.
- Updated the pretty print class to v1.5.2.
1.5.0.2
Release date: 2016-01-10
- Fix weird table layout on front-end in combination with Twenty-Sixteen theme.
- Leaner loading of text domains.
Screenshots
For developers
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Best Debug Bar Constants alternatives
All Constants plugins →FAQ
Debug Bar Constants: quick answers
Straight answers, pulled from live WordPress.org data.
Live data from WordPress.org · checked Sep 29, 2026
Is Debug Bar Constants free?
Yes. Debug Bar Constants is free to download and use from the official WordPress.org plugin directory.
Is Debug Bar Constants safe to use in 2026?
Debug Bar Constants shows warning signs in 2026 — compare the alternatives below before installing. It runs on 20+ sites, is rated 5/5 and was last updated 9 years ago, and scores 31/100 on our health check.
How many websites use Debug Bar Constants?
Debug Bar Constants is active on 20+ WordPress websites and has been downloaded 54,790 times since it launched in April 2013. It was downloaded 108 times in the last 30 days.
Does Debug Bar Constants work with WordPress 7.1?
Debug Bar Constants is officially tested up to WordPress 4.9.33, while the latest release is 7.1.2. It may still work, but try it on a staging site first.
What PHP version does Debug Bar Constants need?
Debug Bar Constants requires PHP 5.2.4 or higher. Most hosts run PHP 8.x today, so it works on any modern WordPress hosting.
When was Debug Bar Constants last updated?
The latest version, 2.0.0, was released on January 22, 2018 (9 years ago).
Who makes Debug Bar Constants?
Debug Bar Constants is developed and maintained by Juliette Reinders Folmer.
What are the best alternatives to Debug Bar Constants?
The most popular alternatives to Debug Bar Constants are Define Constants (40+ installs), WP Config Constants (10+ installs) and PHP Constants Manager (10+ installs).
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