1. HTML5 is the latest and most enhanced version of HTML.Technically, HTML is not a programming language, but rather a mark up language.
2. Cascading Style Sheets (CSS) is a style sheet language used for describing the look and formatting of a document written in a markup language.CSS3 is a latest standard of css earlier versions.
5. The PHP Hypertext Preprocessor (PHP) is a programming language that allows web developers to create dynamic content that interacts with databases.