Responsive Web Design is used in all types of modern web development.
PHP is a SERVER side Scripting Language.
MySQL is a Database, Used to Access the Data, Manipulate the Data & Delete the Data.
It is a Free & Open Source.So that, many programers are using the PHP & MySQL.
.NET is a developer platform made up of tools, programming languages, and libraries for building many different types of applications
ASP.NET performs faster than any popular web framework in the independent TechEmpower benchmarks.
ASP.NET supports industry standard authentication protocols. Built-in features help protect your apps against cross-site scripting (XSS) and cross-site request forgery (CSRF).
ASP.NET provides a built-in user database with support for multi-factor authentication and external authentication with Google, Twitter, and more.