PHP execution via Dropbox and new to programming. How do I set up?

I bought a place from dropbox for personal use and I found out that they have a shared folder where I can share my files like a website. I wanted to learn PHP by storing my files in a Dropbox folder, and it doesn't require FTP from me.

I don't know much about website programming. I have some technical programming experience for the job. But it is so. I tried following this page , but I really don't understand them. I also looked at this youtube page but it is not a window and I am stuck using composer. I have followed as best I can, but all the samples in the SDK never show up correctly. Anyone with other sources to help me get started with PHP through my Dropbox? Thanks in advance.