HTML, which stands for HyperText Markup Language, is the standard markup language used for creating web pages and web applications. It's a fundamental technology for the World Wide Web, defining the structure and content of web documents.
CSS, which stands for Cascading Style Sheets, is a stylesheet language used to describe the presentation of a document written in markup languages like HTML or XML. It dictates how elements should be rendered on various media, including screens, paper, or in speech.
PHP stands for "PHP: Hypertext Preprocessor," is an open-source, server-side scripting language primarily used for web development. It is embedded within HTML and allows developers to create dynamic and interactive web content.
JavaScript (JS) is a lightweight, interpreted, or just-in-time compiled programming language primarily known as the scripting language for web pages. It enables developers to create dynamic and interactive content on websites.