The basic advantage of yii is the rapid prototype development is an important factor, so if time is essential Yii is one of the first choices. Yii2 is an open-source best for minimum viable Products. You can build backends web app on this for making tests to marketplace, but also is good for large scale applications.
It's full Object-Oriented Framework, includes in-build ORM Active Record for accessing the database, has reach sets of widgets such as DataGrids, Gridviews, Detail views. Also, Jquery UI library has a by yii wrapper, this has as result to make frontend development easier.
It is restful friendly for your application and supports ajax in various frontend widgets like in grid views. Security support exists out of the box to prevent XSS, CSRF and other attacks. There are native extensions that make it easy to integrate technologies like MongoDB, Redis to projects.