[Question] How to make a website response to a CC Computer?

Hello, I want to make a site for my OS, so u can login & Register in the terminal. Passwords, registering, banning ect will be on the site.

Can someone tell me how to send a signal, and how the server responses to?
(I got: PhP, HTML, CSS (For layouts…), and more)

http.get and http.post return a file handle for a temp file containing the source code for what ever address it called,
IE:
html page returns html code,
txt file returns text in the file,
php script returns what ever was echoed by it,

basically whatever you see when you go to a page and do view page source.

So you can make a php script respond to get and post requests and echo an answer.

Take this php script:

<?php
$text = $_GET['text'];
$result = sha1($text);
echo $result;
?>

It echos the sha1 hash of the get field "text"

You can then use a program to get the sha1 hash,

local str = "Hello World" --String to hash
local file = http.get("hostname/sha1script.php?text="..str) --Make get request making field "text" = str
local hash = file:readAll() --Read all text from file
print(hash) --Print the resultant hash

That is a simple example,
You can make way more complicated things,

Well, I mean more like:

Me logging in on ComputerCraft OS — Site responses if pass is good
Session is being started (Able to make in PhP)
Im admin, I promote someone, PhP page gets the signal; Opens a file, cheanges level.
I logout, Session being stopped.

How do i make the page response

Any way you want. You just need to be able to tell the difference on the computer.

Yeah, i was doing stupid; Some if vars, a new GET value and done!