Folder permissions keep changing from www-data to root

Question

A folder under the directory /var/www/xml keeps changing permission from www-data to root meaning that no php file is able to write into the folder.

This seems to happen when I restart the server.

drwxr-xr-x 6 root www-data 4096 Sep 10 13:40 xml

chown www-data -R /var/www/xml

drwxr-xr-x 6 www-data www-data 4096 Sep 10 13:40 xml

How do I make sure this does not happen?

Answer 1

  you can change the owner of the www folder it will solve it

 sudo chown user /var/www

           and logout and login.
           Then open the var folder,   right click on www folder select properties
            now you can edit the permission of the www folder.