Thank you for choosing Yii 2 - a modern PHP framework designed for professional Web development.
Yii 2 is a complete rewrite of its previous version Yii 1.1 which is one of the most popular PHP frameworks. Yii 2 inherits the main spirit behind Yii for being simple, fast and highly extensible. Yii 2 requires PHP 5.4 and embraces the best practices and protocols found in modern Web application development.
build/ internally used build tools
docs/ documentation
framework/ core framework code
tests/ tests of the core framework code
The minimum requirement by Yii is that your Web server supports PHP 5.4.
Yii 2.0 has a Definitive Guide and a Class Reference which cover every detail of Yii.
There is also a PDF version of the Definitive Guide and a Definitive Guide Mirror which update every 15 minutes.
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.
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.
In order to make it easier we've prepared special yii2-dev Composer package.