Tran Ngoc Tuan Anh

FitWP

This plugin adds an extra panel to <a href="https://wordpress.org/plugins/debug-bar/" rel="ugc">Debug Bar</a> plugin that allows developers to output custom debug info.
Developers can log any variable to see its value when running PHP in WordPress. This helps developers see the real-time values of variables. It works exactly like <code>console.log()</code> in browsers.
<h4>How to add custom debug info</h4>
Add the following code wherever you want to debug a variable:
<pre><code>do_action( 'add_debug_info', $var, $label );
</code></pre>
where <code>$var</code> can has any data type.
<ul>
<li>If <code>$var</code> is a string or any simple value, the value is outputted directly.</li>
<li>If <code>$var</code> is an array or object, the output is the same as <code>print_r( $var )</code>.</li>
</ul>
And <code>$label</code> is the description label (optional).
<h4>How to view debug info</h4>
<ul>
<li>Click on Debug Bar in the top right of the admin bar</li>
<li>Select Custom Info panel (see <a href="https://wordpress.org/plugins/debug-bar-custom-info/screenshots/" rel="ugc">screenshots</a>)</li>
</ul>
<a href="http://fitwp.com/plugins/debug-bar-custom-info/" rel="nofollow ugc">Project Homepage</a> | <a href="https://github.com/fitwp/debug-bar-custom-info/issues" rel="nofollow ugc">Report Bugs</a> | <a href="http://www.deluxeblogtips.com/donate/" rel="nofollow ugc">Donate</a>

Debug Bar Custom Info

This plugin adds an extra panel to Debug Bar plugin that allows developers to output custom debug info.

gilles66

Need to know which template is used by WordPress to display your pages in the front office ? 
This plugin simply does this.
Show the name of the php file of your theme used to display the current page.Need to know which template is used by WordPress to display your pages in the front office ? 
This plugin simply does this.
Efficient and very easy to install, it will show you in the admin bar the name of the php file currently used to display the current page. 
The color of the text is different regarding the origin of the template(the theme, a parent theme, or a plugin) 
(icon author :http://www.megaicons.net/iconspack-1096/45043/)

which template file

Show the name of the php file of your theme used to display the current page.

Debug Bar Custom Info vs which template file