horike

Displays Super Global valiables for the current request.Like $_POST, $_GET, and $_COOKIE. Requires the debug bar plugin.

Debug Bar Super Globals

Hasn't received any updates in 8 years and it STILL WORKS!

Still Works (as of WordPress 5.5)

Displays Super Global valiables for the current request.Like $_POST, $_GET, and $_COOKIE. Requires the debug bar plugin.

Juliette Reinders Folmer

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:
<ul>
<li>WP Constants</li>
<li>WP Class Constants</li>
<li>PHP Constants</li>
</ul>
<h4>Important</h4>
This plugin requires the <a href="https://wordpress.org/plugins/debug-bar/" rel="ugc">Debug Bar</a> 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 <a href="https://wordpress.org/support/view/plugin-reviews/debug-bar-constants" rel="ugc">rate and/or review</a> 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 <a href="https://wordpress.org/support/plugin/debug-bar-constants" rel="ugc">Support Forum</a> or in the <a href="https://github.com/jrfnl/Debug-Bar-Constants/issues" rel="nofollow ugc">GitHub repository</a>.

Debug Bar Constants

Debug Bar Constants adds three new panels to the Debug Bar that display the defined WP and PHP constants for the current request.

Debug Bar Super Globals vs Debug Bar Constants