CakePHP and Zend Framework is a powerful open source PHP based framework used to develop feature rich website & applications. The development turnaround time in Zend Framework or in CakePHP is much faster. The rich set of libraries in offer and the MVC architectural pattern makes it a cost effective and independent modular development platform.

Why CakePHP or Zend Framework?

Both are Open source framework which can accommodate high level of customization.
Benefits of MVC architecture.
Fully modular codebase with UI-based module builder.
Reusable libraries with enhanced security.
User management with role based access of modules.
SEO friendly.