what is CGI

CGI is a common gateway interface which is a specification for transferring information between the world wide web and a CGI program. A CGI program is any program which is designed to accept and return data that confirms to the CGI specification. The program could be written in any programming language. CGI programs are the most common way for web servers to interact dynamical with any user. Many HTML pages that contain forms use a CGI program because it processes the forms data first.