This question has already been asked here: https://community.apachefriends.org/f/viewtopic.php?f=16&t=78252&p=264994,
but with no response.
So I try again: in the directory C:\xampp\php there is a subdirectory C:\xampp\php\windowsXamppPhp. Most if not all of the files in there are exact copies of the ones found in the C:\xampp\php directory itself.
It's not a problem so far, but if files are updated in only one of the two directories it could lead to unpredictible behaviour, since it is not clear which component looks in which directory.
Regards
eddi