convert php page to pdf

Hello. I have a database with users from my site and a lot of info about each one. I can browser that database with a simple backend that it's allready done, it has listed the name of the users and i can click and then go to the page with all the details of that specifi cliente. My backend allow me to view, add, edit and delete users. I need to add a button to save user info in pdf. So the project is basicly transform a php page in pdf. The data on that php page is connected to the database. Can someone help me with this project? Thank you More info including a preview of the page to be saved as pdf can be showed by request.