Simple question: Should I use framework for my browser-game (PHP)?

I have writen, all my idea. Got database ready, and now I should start coding, but I thought about, that maybe it will be good time to learn Yii. I was trying to find some information if using framework for browser-game.

Of course I am aware that it will be more time consuming (because I will be learning Yii), but I think it will keep my code in better shape. So what's your opinion?