Which languages should i learn to be back end developer

Answer 1

https://www.quora.com/I-want-to-be-a-back-end-web-developer-What-programming-languages-should-I-learn-and-do-I-need-to-learn-HTML-and-CSS

Answer 2

usage of server side programming languages for websites. php is the most popular language for web

Answer 3

thanks luka

Answer 4

c++