An upgrade guide detailing which changes there are between Xdebug 2 and 3, and how to reconfigure your set-up to do similar things. New Concepts # Unlike Xdebug 2, where there was an enabling setting for each feature, with Xdebug 3 you put Xdebug into a specific mode, which can be configured with the xdebug.mode setting. This setting, in combination with xdebug.start_with_request is the new way to