We are using Kohana for several of our applications.

http://kohanaframework.org/

We looked at several other frameworks at the time (symphony, cake php,
code igniter, and zend), but decided to use kohana because it was
lightweight, yet had all of the features we needed.  We have been using
it for several years and have been very happy.

-- 
Debbie Gillespie
Systems Staff
Dept. of Computer Science & Engineering
University of Minnesota

Simone Q. Vuong wrote:
> Has anyone explored using *PHP* with a framework -- I'm considering the
> *Yii* framework for PHP -- and/or *Ruby on Rails*?
> 
> Could you tell me:
> 
>     * what you are using it for,
>     * your pros and cons for using either,
>     * easy of use,
>     * the availability of resources for learning and trouble-shooting,
>     * references you highly recommend, and
>     * anything else you find relevant.
> 
> 
> Thank you kindly.
> 
> Simone Vuong
> Health Studies Section
>