"Who" creates files in a temporary folder when they are uploaded?

Question

PHP

Question from the heading "I know the world".
It's about files downloaded via http.
Interested in a bunch of php and nginx.
Does PHP parse the request, extract the files there and put them in a temporary folder, or is it the role of the web server?

Answer 1

Nginx parses the request header and redirects it to php and it already parses the request body. PHP has an upload_tmp_dir option that allows you to specify exactly where to upload these temporary files. As for the nginx module, this is a separate non-standard mechanism and will not be visible in the $_FILES variable (unless, of course, they fix it specifically for the nginx module). If you implement your own http server with CGI/FastCGI support, you won't have to parse the request body.