Which languages r backend of webdevelopment.i first learn which languages

Question

web

Answer 1

Java, PHP, nodejs by example...

Answer 2

below are the details of website development ..
1) HTML for web page .
2) CSS for page styling.
3)JavaScript & Jquery for action on page.(eg calculation)
4) bootstrap for responsive webpage
on server side programming we need learn
5)PHP for server side.
6)my SQL for database for our website
7) Ajax