It is possible to pass methods to session_set_save_handler()?

While trying to encapsulate PHP4 sessions in a class I have found a problem trying to pass methods instead of pure functions to session_set_save_handler(). This is a sketch of the relevant part of the class: class Session { function open() { whatever; } function close() { whatever; } .... function Session() { // constructor /************ Set my own session save handler ************ If the handlers were pure functions the call to set my handlers would be: session_set_save_handler("open","close",...); But they are methods of this class, so what I need is something like this: session_set_save_handler("$this->open", "$this->close",..); Of course it doesn't look like it could work this way. Is there any solution? *****************************************************************/ session_set_save_handler("?????","?????",..); session_start(); } } Jose Saura