Chris Taylor

Shows you the values of constants defined in your wp-config.php file. Useful if you need to quickly check things like the database and debug settings. For security reasons it will obfuscate the DB_PASSWORD constant and all security key and salt constants.

WP Config Constants

Shows you the values of constants defined in your wp-config.php file

ramon fincken

GUI in backend to define constants without any programming knowledge. Every file in your theme has access to your constant. No need to edit a functions.php file or a separate plugin file anymore 
Results in constants like: define(‘MY_CONSTANT’,$value);
Options: Re-arrange constants (Drag and drop) 
Protect constants as “internal value” 
Optional description per constant 🙂
Coding by: 
<a href="https://wordpress.org/extend/plugins/profile/dvankooten" rel="ugc">Danny van Kooten</a> 
<a href="http://www.mijnpress.nl" rel="nofollow ugc">MijnPress.nl</a> <a href="http://twitter.com/#!/ramonfincken" rel="nofollow ugc">Twitter profile</a> <a href="https://wordpress.org/extend/plugins/profile/ramon-fincken" rel="ugc">More plugins</a>

Define Constants

GUI in backend to define constants without any programming knowledge. Every file in your theme has access to your constant.

WP Config Constants vs Define Constants