Yii is a high-performance framework for scalable, highly modular development of any website of
application, independent on the scope or scale of the task. It is an open-source product, meaning that
it can be used free of charge, highly suitable for creating attractive, extensive, and responsive
designs that are highly regarded by many businesses worldwide.
Yii was originally intended to serve as an improved version of PRADO framework overcoming key
issues like slow speed when working with complex pages, difficulty to learn and master, limited
customisation. It was first released in 2006 as an alpha version, followed by the production-ready
version 1.0 in the last month of 2008. In 2013 the release of version 2.0 went public that was based
on and able to capitalise on the latest versions of PHP and improved architecture.
Currently, the framework is a very popular choice for development of challenging, large-scale, data-, traffic-, or computing-intensive projects, as it covers many important aspects of rapid software development, such as:
- Designed following MVC principles.
- Generation of complex WSDL service specifications and management of Web service request handling.
- Support for translations and localisation
- Extensive caching support
- Highly capable, configurable, and manageable logging and error handling
- Built-in security measures to simplify protection against common vulnerabilities like CSRF, XSS, cookie tampering, and SQL injection
- Rapid code generation using a custom tool named Gii
- Full compliance with XHTML standard
- Compatibility-by-design with 3rd-party frameworks.