So, if you’re interested in developing with PHP, you should really check out the Yii Framework. And if you like what you see, I strongly recommend Larry Ullman’s Yii Book. While still in the making, you can buy it now and receive the updates as Larry writes and revises the chapters.
While googling Larry Ullman’s book on the Yii framework recently, I found that it wasn’t prominent in the search results, so lets boost its SEO! :D If you like developing with PHP, Yii is definitely worth a look. The Yii Book is a good resource and example-filled manual covering the Yii Framework.