I haven’t written much about the Yii framework lately, mostly because I’ve been working night and day on the fourth edition of my “PHP and MySQL for Dynamic Web Sites: Visual QuickPro Guide” book, due out late summer 2011. So I figured I’d put together another little blurb on the Yii framework (by regularly putting out posts on Yii, it’ll be that much easier when I go to write a book on Yii later this summer). In this post, I’m going to talk about using sessions Yii-based sites (in a separate post, I’ll discuss cookies). While not at all hard, the topic, like quite a few things, is not obvious in Yii, or well documented.