php is not recognized as an internal or external command (windows 7)
It works now. The problem was that extra slash at the end (in the PATH environment variable).
I tried with:
C:\Program Files\TortoiseGit\bin;C:\xampp\php\
but it didn't work, then with
C:\Program Files\TortoiseGit\bin; C:\xampp\php
but it didn't work also (notice the extra space before 'C:..').
Eventually,
C:\Program Files\TortoiseGit\bin;C:\xampp\php
did the trick.