Keep the most consistent with the old version

If Yii 2.0 has too much difference from the current version 1.1.8

lots of applications have to be changed a lot…

that’s a big work…

So is it possible to keep consistent as possible as it can.

No.

That’s what ‘major version’ means.

Don’t upgrade any existing apps to 2.0, but start new ones using it.

Will 2.0 use namespace? the php 5.3 or php 5.4?

so it will be big difference from 1.1.8?

Will 2.0 use namespace?

Yes

the php 5.3 or php 5.4?

5.3

so it will be big difference from 1.1.8?

"Our next major release Yii 2.0 will be a complete rewrite of the framework on top of PHP 5.3.0+. It will not be fully compatible with 1.1.x. However, we will try every effort to make the transition as easy as possible." from http://www.yiiframework.com/download/