CGI stands for Common Gateway Interface. It is a standard for interfacing external applications with web servers. The CGI protocol allows web servers to execute programs, scripts, or other types of code on the server side and return the output to the client in the form of a web page.
CGI was one of the first methods used to create dynamic web pages, allowing developers to create interactive web applications that could retrieve and display data from a database or other external source. It is still widely used today, but has been largely replaced by newer technologies such as PHP, ASP.NET, and Ruby on Rails.
The CGI specification defines a standard way for web servers to communicate with external programs. When a client requests a CGI script, the web server runs the script and sends the output back to the client. The script can take input from the client, such as form data, and use it to generate the output.
CGI scripts can be written in a variety of programming languages, including Perl, Python, and C++. They can be used to perform a wide range of tasks, such as retrieving and displaying data from a database, sending email, and generating dynamic images.
In summary, CGI stands for Common Gateway Interface, is a standard for interfacing external applications with web servers. It allows web servers to execute programs, scripts, or other types of code on the server side and return the output to the client in the form of a web page. CGI was one of the first methods used to create dynamic web pages, allowing developers to create interactive web applications that could retrieve and display data from a database or other external source. It has been largely replaced by newer technologies such as PHP, ASP.NET, and Ruby on Rails. CGI scripts can be written in a variety of programming languages, and they can be used to perform a wide range of tasks.