CakePHP is a popular open-source web development framework written in PHP. It follows the model-view-controller (MVC) architectural pattern, offering a structured and efficient approach to building web applications. With CakePHP, developers can rapidly create robust and scalable applications by leveraging its built-in conventions, code generation, and ORM (Object-Relational Mapping) capabilities. The framework provides features such as data validation, caching, security, and localization, making it a reliable choice for developing feature-rich web applications. CakePHP's intuitive syntax and extensive documentation contribute to its ease of use and popularity among developers.