PHP is a fast scripting language that is ubiquitous with web development. WordPress uses the language as it’s core interface for developers to enhance the platform. It’s relatively easy to learn and is well supported by the development community.
While PHP helps developers create web applications quickly, there is no development environment associated with the language. By contrast, a development environment such as Visual Studio from Microsoft comes with many features available from installation. Visual Studio has features for coding, debugging, and deploying available to developers straight out of the box.