[horde] SessionHandler::gc() and expiration

[Chuck Hagenbuch]

Quoting Manuel Molina Cuberos <mmolina at webactiva.com>:

> I'm trying to figure out how to expire the sessions in my MySQL  
> horde.horde_sessionhandler table. I've discovered that there's a  
> method implemented.
> My question: When is it used ?

It's called automatically by PHP when session.gc_probability is hit.  
See http://us3.php.net/session

-chuck