What advantages are there on using GWT over a php framework such as Yii?

One big difference I haven't seen mentioned in the question or answers/comments is that Yii is a server-side framework, which runs entirely on your own/hosted server, whereas GWT compiles to JavaScript, and is therefore runs in the client's browser only. These two offerings (and ideas) serve very different purposes, and can be used together.

If you like Eclipse you can certainly stay with Eclipse and still develop in PHP. The PHP tools from eclipse.org are very good and the IDE plugin from Aptana is even better.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.