'D:\xampp\php\' is not recognized as an internal or external command, operable
program or batch file.
If you want to use
php without specifying its full path you should modify
%PATH% (or create a new
%PATH% user variable):
%PATH% tells the operating system which directories to search when you try to run things. Make sure to log out and back in after changing this variable.
See also http://superuser.com/q/317631/312289