Use this plugin to turn on WP_DEBUG on sites where there is no access to the wp-config.php file

Displays if WP_DEBUG is active in the admin footer. This plugin can be used alone or together with the "Server IP & Memory Usage Display" plugin.

One click enable/disable debugging, clear debug.log, search, sort, and filter errors. See new errors automatically without refreshing.

Toggle WP_DEBUG on/off through the admin toolbar