Access yii framework

Hi all,

I am new to yii framework. I have a requirment. I have downloaded yii framework and put it in one folder. now I want to access this yii framework libraries from onother file. How can we access?

can any one please response for this.

Did you read this section of the guide?
https://www.yiiframework.com/doc/guide/2.0/en/tutorial-yii-integration#working-with-third-party-code