Yii
Yii is a high-performance, component-based PHP framework for developing modern web applications. It follows the Model-View-Controller (MVC) architectural pattern and includes features like form validation, authentication, caching, and RESTful API support. Known for its speed and security, Yii is designed to help developers build robust and scalable applications efficiently.
Developers should learn Yii when building complex, data-intensive web applications such as e-commerce platforms, content management systems, or enterprise solutions that require high performance and security. It is particularly useful for projects needing rapid development with built-in tools for database abstraction, code generation via Gii, and comprehensive testing support. Yii's strong community and extensive documentation make it a reliable choice for PHP developers seeking a structured framework.