Thank you for choosing Yii - a high-performance component-based PHP framework.

If you are looking for a production-ready PHP framework, please use Yii v1.1.

Yii 2.0 is still under heavy development. We may make significant changes without prior notices. Yii 2.0 is not ready for production use yet.

  apps/                ready-to-use Web apps built on Yii 2
      advanced/        advanced app template with complex features
      basic/           a simple app supporting user login and contact page
      benchmark/       app demonstrating the minimal overhead introduced by the framework
  build/               internally used build tools
  docs/                documentation
  extensions/          extensions 
  framework/           framework files
      yii/             framework source files
  tests/               tests of the core framework code

The minimum requirement by Yii is that your Web server supports PHP 5.3.?.

For 1.1 users, you may refer to Upgrading from Yii 1.1 to have a general idea of what has changed in 2.0.

Definitive Guide draft is available. It's not complete yet but main parts are already OK.

Your participation to Yii 2 development is very welcome!

You may participate in the following ways:

• Report issues
• Give us feedback or start a design discussion
• Fix issues, develop features, write/polish documentation
  • Before you start, please adopt an existing issue (labelled with "ready for adoption") or start a new one to avoid duplicated efforts.
  • Please submit a merge request after you finish development.