Some of the advantages of hiring Yii PHP Framework developers include:
Yii is an open source framework, so developers have access to a wealth of information and support online
Yii is fast and efficient, perfect for developing large scale applications
Yii provides a wide range of features out of the box, including caching, authentication and authorization, scaffolding, input validation, etc.
Yii is highly extensible - if you need additional functionality not provided by the core framework, there are many extensions available