Member function as error_handler

Query One: Can I use a member function of an object as an error_handler? I currently declare a function for error handling with every page, but I would like to put it in an object which lives in the session anyway. The problem is I can't seem to do it; when I try to set the error handler to a method, it defaults to PHP's usual methods. Is it me or PHP? MTIA, Nik -- http://travelog.uberblog.com/