There are several methods and techniques that come handy in the case you need to call an external resource periodically or if you are waiting for a server push, but I present here an easy and straightforward one using HTML5's Server-Sent Events (SSE).
MrFisk is a sleek little bot hanging out in the official #yii IRC channel on freenode, meant to serve Yii users with documentation lookups and other things. This document intends to provide a summary of what MrFisk can do for you and how to use his fin^H^Heatures.
This is a reference to be used for Model rule validation and is compiled from the Yii documentation and code. The purpose is to have all the information gathered in one place instead of scattered. This reference is not an intro.
See The Definitive Guide to Yii, Declaring Validation Rules for a tutorial.
I saw many posts that community newbie is confuse in image/photo upload with random name.
so I post this topic covering all useful things regarding to image/photo upload(not covering image attribute related functionality)