Krumo is a debugging tool equivalent to print_r() and var_dump(), with the advantage of collapsing array and object values so that it takes less space and let us see only what we really need from complex data.
<a href="http://hikari.ws/krumo/" rel="nofollow ugc">Hikari Krumo</a> ports it to a WordPress plugin, so that Krumo becomes easily available in any WordPress page. Original Krumo has a few bugs fixed and has its options available in an admin page instead of requiring krumo.ini file edited directly.
<h4>Features</h4>
<ul>
<li>The simplicity of print_r() with the details of var_dump()</li>
<li>Show any data, including its data type</li>
<li>For arrays and objects, internal data are collapsed, so that it takes less space and you can expand to see only those values you really wanna see, spending much less space</li>
<li>Works anywhere in WordPress, backend and frontend</li>
<li>Hide it from visitors and only those who really need to see dump be able to see it</li>
<li>Automatically shows PHP file and line where dump happened, a great tool for debugging</li>
</ul>

Hikari Krumo

Krumo is a debug tool able of collapsing array and object values so that it takes less space and let us see only what we really need from complex data

wolkenkraft

This plugin integrates the popular Krumo class in you WordPress installation. Krumo helps developers to debug objects 
and variables. It presents debug output in a well formated and structured form.
After Installation simply try to debug some variables like this:
 
For detailed instruction visit my <a href="http://www.wolkenkraft.com/produkte/wordpress-plugins/krumo-debug-plugin" rel="nofollow ugc">wolkenkraft.com Website</a> 
or the <a href="http://krumo.sourceforge.net/" rel="nofollow ugc">Krumo Website</a>

wolkenkraft.com Krumo Debug Plugin

This plugin integrates the great Krumo class in WordPress which allows debugging of objects and variables in a
well formated and structured form.

Hikari Krumo vs wolkenkraft.com Krumo Debug Plugin