In my experience the only things you really need to look out for are:
1) file functions requiring different path details (and associated access
permissions - CHMOD).
2) line breaks in files/output.
2) extensions/changes to PHP exe other than the default can be a pain if
you're not the administrator
Generally there will be little to do except change credentials for DB etc,
only thing that will possibly be affected is paths to included files, your
depolyment server is running php in safe_mode then you will need to use
full-path's to the files.
Other than that it 'should' simply be a case of up
