Yii Config: Application ID?

Was just reading a wiki article on single-sign on for sub-domains. I’ve got the cookie stuff setup, and everything pretty much ready to go, however the article mentions an “application id” to identify, as well as generate a unique signed key…

http://www.yiiframework.com/wiki/135/single-sign-on-across-multiple-subdomains/

Where should I put this? Right in the top of my main.php??

Yes, application id should be at the first level of the config. Actually it should be already there if you’ve used yiic webapp.