Questions about PHP mySQL and HTML programming, I'm new to HTML Options

[The_Phil]

I am considering learning HTML for making a certain internet based program.
Currently I am working on a Duolingo mock for a programming site called scratch. However the "Cloud" variables are far too limited. Here's my desire:
I want to make a program where people can create accounts and not only use language courses but create they're own. This program would include the ability to upload pic and sound files to add to one's course. I was looking into storing data on severs and found that HTML can use PHP and mySQL to save data pretty cheaply. Would HTML coupled with PHP mySQL be a sufficient means of creating an interactive program like Duolingo? If not are there any other languages that are more ready for this?
Thanks!

[pandy]

Probably, but I don't know anything about this Duolingo. I just want to clarify that HTML is a markup langue, or maybe I should say *the* markup language, used for the front end of web pages. For all web pages. It's the only way to create a web page. That is, if you want a web page you will have to use HTML. If the page is static or dynamic or how advanced the backend is doesn't matter. You need HTML.

So that's one down. I don't know if PHP and mySQL are the best choice or not, but they can probably get the job done.