PHP is a server-side scripting language that is commonly used for web development and can be embedded into HTML code. It allows developers to manage dynamic content, connect to databases, track sessions, and build e-commerce sites. PHP code runs on the server and generates HTML that is sent to the user's browser. It is free, runs on most server platforms, and has a large community of developers. LIT Susant K Rout offers PHP training courses in Bhubaneswar, Odisha, India to teach participants how to use PHP for web development.