# WP_DEBUG `WP_DEBUG` is a PHP constant in WordPress that, when enabled, activates the debugging mode. This mode displays PHP errors, notices, and warnings on your website, which are normally hidden. It's a valuable tool for developers to identify and fix issues within their WordPress themes, plugins, or core installation. Visit the following resources to learn more: - [@official@Debugging in WordPress](https://developer.wordpress.org/advanced-administration/debug/debug-wordpress/) - [@article@A Complete Guide to WordPress Debugging (Enable WP_DEBUG + Other Tools)](https://kinsta.com/blog/wordpress-debug/) - [@article@How To Enable WP_DEBUG Mode In WordPress](https://instawp.com/how-to-enable-wp-debug-mode-in-wordpress/) - [@video@Debugging in WordPress](https://www.youtube.com/watch?v=gY3htjypHL0) - [@video@The built-in WordPress debugging options](https://www.youtube.com/watch?v=wCh2_LLYC2Q)