A web application can be made more robust and its performance can be enhanced a great deal if its static data is stored in a cache and is used whenever needed from the location. YII framework features top class caching features and offers caching at multiple levels while supporting a number of cache components. YII framework is a free open source web application development framework written in PHP5. It is fast, lightweight, secure, reliable and professional. So, it is always beneficial to hire PHP developers and programmers proficient in YII framework.