Yii is a high-performance PHP framework best for developing Web 2.0 applications.
https://www.yiiframework.com/
Content Management System
Get access to data on 333,694 websites that are Yii Framework Customers. We know of 132,398 live websites using Yii Framework and an additional 201,296 sites that used Yii Framework historically and 37,039 websites in the United States.
Get a list of 333,694 websites using Yii Framework which includes location information, hosting data, contact details, 132,398 currently live websites and an additional 175,126 domains that redirect to sites in this list. 201,296 sites that used this technology previously and 37,039 websites in the United States currently using Yii Framework.
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