What is Yii Framework | Advantages of Yii over other frameworks | Different versions of Yii

• Yii is a component-based PHP framework for developing modern applications.
• The Yii stands for yes it is.
• The name Yii means simple and evolutionary in Chinese.

What are the advantages of YII compare with Other Frameworks?

• Like most of the other PHP frameworks, YII is also implemented MVC(Model View Controller) architectural pattern.
• It promotes code organization based on the architectural pattern.
• Yii will design things mainly for the purpose of following strictly some design patterns
• The code should be written in a simple yet elegant way. 
• Yii is a full-stack framework.
• Executing with high performance is always a primary goal of YII.
• Yii provides many proven and ready to use features.
• Yii provides multi-tier caching support, RESTful API development support, Relational and No-SQL databases, etc.
• Yii is backed by a strong developer team.
• A large number of professionals are constantly are contributing to the development of the Yii framework.

Different versions of Yii framework

1. Version 1.1
2. Version 2.0

• Version 1.1 is old and now in maintenance mode.
• Version 2.0 is a complete rewrite of the version 1.1