Differences between html,php,xml and JavaScript?

Question

I don't know about the programming languages.

Answer 1

The first notable differences, are that HTML, and XML are NOT programming languages, while JS and PHP both are programming languages.

HTML, or HyperText Markup Language is a language used to describe the content of a document (usually a web-page), similarly to XML, or eXtensible Markup Language, used instead to describe the content of application files.
As for JavaScript, it's a very powerful programming language, that can be used to interact with HTML elements, determining the behavior of a web-page. PHP is very much the same, but unlike JS, PHP can interact directly with the server, while JS interacts with your computer's browser.
Sorry for the late reply.

Answer 2

If you have any more doubts, try asking specific questions

Answer 3

HTML stands for HyperText Markup Language. Markup language uses tags to identify content. HTML determines the structure of your web pages. PHP is open source scripting language. PHP scripts are executed on the server. JavaScript is a Client Side Scripting Language.
It runs on your computer after you've loaded the web page containing the script.