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Viewing environment information with Query Monitor
The Environment panel in Query Monitor gives you an overview of the server and software configura...
Debugging "Doing it Wrong" notices with Query Monitor
WordPress has an internal function called _doing_it_wrong() which is triggered when code uses th...
Debugging database queries with Query Monitor
The database query panels are where Query Monitor originally earned its name. There are several s...
Debugging conditional tags with Query Monitor
WordPress has a large number of conditional tags such as is_single(), is_home(), and is_admin(...
Browser extension
The Query Monitor browser extension is no longer maintained. It might return in the future.
Debugging blocks with Query Monitor
The Blocks panel in Query Monitor lists all of the blocks on the current page, along with their a...
Performing assertions in Query Monitor
Query Monitor allows developers to perform assertions which will log an error in the Logs panel i...
Debugging the admin screen with Query Monitor
The Admin Screen panel in Query Monitor is available when you're viewing a page in the WordPress ...
Silencing errors from certain plugins and themes in Query Monitor
When a PHP warning or notice occurs during the page load, Query Monitor displays a coloured notif...
Query Monitor 4
Query Monitor is the developer tools panel for WordPress and WooCommerce. Version 4 of Query Moni...
db.php symlink
In addition to the main plugin files, Query Monitor includes a file named db.php which gets syml...
Configuration constants
The following PHP constants can be defined in your wp-config.php file in order to control the beh...
Clickable stack traces and function names in Query Monitor
Many panels in Query Monitor display function names or stack traces. Wouldn't it be great if you ...
Cache hit rate
Does your object cache hit rate always show as 100%? If so, this is possibly due to a bug in the...
Browser extension help
The Query Monitor browser extension is no longer maintained. It might return in the future.
Query Monitor add-on plugins
Third-party plugins that extend Query Monitor Query Monitor Extend Lists conditionals for WooComm...
Privacy statements
Query Monitor plugin privacy statement Query Monitor is private by default and always will be. It...
Accessibility statements
Query Monitor plugin accessibility statement Query Monitor aims to be fully accessible to all of ...
About the author
Query Monitor is maintained by John Blackbourn, one of the team of core committers to the WordPre...
Using the REST API
These articles explore the basic structure of the WordPress REST API. Global Parameters: learn ab...