Apache HTTP Server is described as “an effort to develop and maintain an open-source HTTP server for modern operating systems including UNIX and Windows NT. The goal of this project is to provide a secure, efficient, and extensible server that provides HTTP services in sync with the current HTTP standards.”
As with all web servers, Apache accepts an HTTP request and serves an HTTP response. The World Wide Web is founded on web servers, and every web site you visit demonstrates the functionality of web servers. I’ve already mentioned that while HTML can be processed by a web browser, server-side scripting languages such as PHP have to be handled by a web server.
