Yii is a performance-oriented PHP framework for building complex web applications. It incorporates structural designs from Prado, Ruby on Rails, Symfony and Joomla, integrates jQuery, Bootstrap, jQuery UI, Composer, Bower, NPM. It provides the common WebMVC scheme, AR / ORM / DAO database abstractions, templating and form input handling, AJAX-enabled widgets, authorization modules, webservice APIs, internationalization, caching, error logging, XSS and CSRF prevention, code generation, plugin and
major feature: Yii 2.0 is a complete rewrite over the previous 1.1 to incorporate newer technologies. Over 10K commits since the last major release were applied.