Web application development for file storage

Question

Good morning all

I am Kingdson.I would like to have your help on the different programming languages ​​that I must use to perfect my web application, for now I use the html and CSS can you help me on the choice of other languages ​​for the behavior and for the management backup files.

Answer 1

Please,it is possible to list all the programming languages ​​that I can use for this project

Answer 2

I like to use php for back-end tasks

Answer 3

For web devlopment:
Php
Css
Javascript
Jquery