Yii ("Yes, it is!") is a popular framework for building PHP language applications. It is an open source software, which gives a lot of possibilities to developers working on highly complex projects. Its undoubted advantage is the principle of maximum reusability, i.e. the ability to repeat the same code as many times as possible, which significantly affects the speed and performance of a website. It is a library using object-oriented programming, and needs PHP version 5.1.0 minimum to run.
Yii - minimalism and high performance for high-traffic applications
Yii has a wide range of applications on the market, and due to its built-in caching systems that are perfect for high traffic, it is most often used for building CMS and data management systems, online forums and e-commerce platforms. The framework also uses MCV (Model-View-Controller) architecture, separating layers of business model, views and a unique controller responsible for making changes in response to user requests, which allows building intelligent applications. It makes use of a number of functional packages that quickly generate the necessary code using functions.