CakePHP is an open-source web application framework for developing web applications in the PHP programming language. It follows the Model-View-Controller (MVC) architectural pattern and provides a structured and modular approach to web application development. Here are some key features and concepts of CakePHP:

1. MVC Architecture: CakePHP is based on the MVC design pattern, which promotes the separation of database models (Models), user interface (Views), and business logic (Controllers). This separation facilitates web application development, maintenance, and scalability.

2. Convention over Configuration: CakePHP follows the "convention over configuration" principle, meaning developers adhere to certain naming conventions and directory structures to minimize configuration. This promotes a consistent and easily understandable codebase.

3. Database Access: CakePHP offers a database abstraction layer that allows developers to easily access different databases and perform SQL queries. Database models are automatically generated from the database schema.

4. Data Validation and Security: The framework provides mechanisms for validating user inputs and defending against common security risks like SQL injection and Cross-Site Scripting (XSS).

5. Built-in Features: CakePHP includes a variety of built-in functions and libraries for common tasks such as authentication, authorization, session management, caching, and more.

6. Extensibility: The framework is highly extensible, and developers can create their own components, helpers, and plugins to extend the functionality of their applications.

7. Community and Support: CakePHP has an active community that continuously contributes to the development of the framework. There is also extensive documentation and tutorials to help developers use the framework effectively.

CakePHP is well-suited for developing web applications of various sizes and complexities. It provides a structured approach to development, which can improve code quality and maintainability. CakePHP is particularly popular among PHP developers looking for a robust framework to implement their web projects.