PHP sessions with handler

[jllanten]

Hi i would like to know if somebody knows in detail how does sessions works with PHP when a handler has been defined. I mean, once i call session_start() what happens ?

Afaik the handler should deal with open(), close(), read() write(), destroy() and gc(). My question is, after calling session_start () which one of the functions is called ? open () ? open () + read () ?

My question is because i see that read() requires the id already to exists so i suppose that before that php has already generated it (or received it from the cookie). Also when does gc () is called ?

I'm having some problem understanding a save handler for a database, that's why the questions. Thanks in advance.

[NogDog]

session_start() will take care of getting/setting the session ID.

The open() function is for anything you want to do when the session is initialized, but does not get/set any data (e.g. set up the DB connection if using a database to store the session data).

The read() function is where you want to get the data and return it as a string, which the session_start() will then use to load into $_SESSION array.

[jllanten]

Thanks nogdog