Very New to Codeigniter need help

Are you asking where to put the code, how to create a PDF, or something else?

I am asking for help on where to put the code, and how to even view the code or print in PDF . One thing I read about codeigniter is that one has to put  some codes in the Crude model and some codes in controller to reference it before writing a code to view it in pdf document Thanks so much if you can give me an heads up to make this code run and show output Once I see an example I will be able to write more query in SQL without any help God Bless

Jay01