Create a full stack php application

Hello,

I want someone to create me a full stack php application similar to https://chatbase.co
1. The application allows creating chatbots powered by ChatGPT.
2. Users can upload their own files and website links to feed information to ChatGPT.
3. The bot can then answer based on the information provided.

Please go through https://chatbase.co as that’s what I need exactly.

Thanks