Just learn PHP and wrote a very simple "app" and now wanting to take it offline.
Trying to connect all the dots.
Look at IndexDB. This is not a standard yet and only works in a few browsers (Chrome I believe).
This is not going to be as nice as actually creating a proper desktop app, but for simple things, it should meet your needs.
I want to store the data the user is submitting locally but then push it to the server once it goes back online.
Is this still the correct location?
Is that file API still my next step?