This plugin hasn’t been updated in over 2 years. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.

Deprecation Checker


WP_DEBUG works well, however is not inclusive of all theme/plugin files that might not be loaded during certain page loads. Deprecation Checker allows you to view all the deprecated functions complete with path, line number, deprecation function name, and the new recommended function to use.

Deprecated files are collated directly from WordPress core itself, so this plugin is scalable with future versions of WordPress.

We’ve included a couple handy filters and constants to make this plugin flexible for your own needs:

  • Turn off plugin/theme directory checks
  • Add your own custom paths to check
  • Add your own deprecated functions to the search


Upload the Deprecation Checker plugin to your wp-content/plugins/ directory and activate. Deprecation Checker lives in the Tools menu.


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Contributors & Developers

“Deprecation Checker” is open source software. The following people have contributed to this plugin.


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Interested in development?

Browse the code, check out the SVN repository, or subscribe to the development log by RSS.

Change log

If you have a feature request or question, please use the Deprecation Checker support forum.