What is CGI mode?

Question

PHP

All the best. I wanted to switch the version of PHP on the hosting and saw that CGI scripts were enabled, I googled - I didn’t figure out what these scripts were at all. Please explain what it is and why you need it. I would be grateful for an answer.

Answer 1

puff can/can interact with web servers in several modes: cgi/fastcgi/module/etc.
mostly used either module or fastcgi/fpm. cgi is a slower mode, but has its advantages over a module.

Answer 2

download or buy Koterov's book php5 or php7 in the original and read IT from the very beginning

Answer 3

The method of connecting programs to a web server was used in the 90s at the dawn of the Internet. Not relevant now.
https://en.wikipedia.org/wiki/CGI

Answer 4

Through CGI, you can connect any external handler that will return a result, so you can execute scripts in php / perl / python and executable binaries, the main thing is that they return the correct result, for example, html with the right headers.