Yii Framework is an open-source, high-performance PHP web application framework that provides a solid foundation for developing modern web applications. It uses the Model-View-Controller (MVC) architectural pattern and provides various features like authentication, authorization, caching, and database abstraction out of the box.
Next.js is a popular open-source React framework for building server-side rendered, production ready web applications. It provides out-of-the-box performance optimizations, such as automatic code splitting and server-side rendering, and supports dynamic data fetching with minimal configuration.