PHP frameworks streamline web development by providing pre-built libraries and components, reducing the need to code everything from scratch. They accelerate development, simplify maintenance, and ensure compliance with coding standards. Frameworks like Laravel, Symfony, and CodeIgniter offer features like MVC architecture, which separates business logic from presentation, improving project structure and flexibility. By automating common tasks like authentication and session management, these frameworks help developers deliver projects faster. PHP frameworks also enable easier collaboration, making it simpler for multiple developers to work on the same project while ensuring long-term maintainability and scalability.