With WordPress itself, there is the so-called debug log, which you can use for debugging. Here you will learn how to enable the debug log and also an alternative way, using a plugin.
Without plugin with the debug.log
To activate the debug.log in WordPress, you have to change to the root directory of your WordPress installation. There you open the file
Here you add now relatively far down, the following two lines:
define('WP_DEBUG', true); define('WP_DEBUG_LOG', true);
After that, if an error occurs, a debug.log is stored in your
wp-content folder. There you will find all errors.
With the help of a plugin
Besides the debug.log, you can install the plugin Query Monitor. This plugin places a new menu in your wp-admin-bar (the black bar at the top). There you will see all the errors that are currently on the page, in the current view. With
WP_DEBUG enabled, even more information will be displayed.
Download: Query Monitor – WordPress.org