Chris M.

The Debug Bar Query Tracer plugin backtraces all calls to <code>WPDB::query()</code> and determines:
<ul>
<li>which plugin caused that database query (it ignores all queries that are a part of normal WordPress activity), and</li>
<li>the function chain that led to that query. </li>
</ul>
It then displays that information on an additional panel in the <a href="https://wordpress.org/extend/plugins/debug-bar/" rel="ugc">Debug Bar</a> 
plugin (which is required).

Debug Bar Query Tracer

A Debug Bar plugin that lets you trace what plugins are causing database queries.

shuliakmaster

Notice TraceLog is a lightweight developer tool that displays PHP backtraces when Notices occur, helping you identify and fix issues caused by early execution or translation loading problems. Useful for debugging during plugin and theme development.

Notice TraceLog

Easily display PHP backtraces when Notices occur. Designed for developers to quickly identify the source of early execution issues in WordPress.

Debug Bar Query Tracer vs Notice TraceLog