Variables (I think?)

[Radon3k]

What exactly do variables such as GET, POST, HTTP_POST_VARS, HTTP_GET_VARS, etc, what do those do (I don't mean can you explain what each one does, I mean the concept behind it)?

If I remember correctly, you can either use the ones that I posted above, or there are alternatives to that.

I'm pretty new to PHP and I'm trying to understand all of this. I have 3 books on PHP/MySQL and sometimes things get confusing because different books use different methods.

Thanks. 🙂

[cgraz]

There's a setting called Register Globals. By default, it's set to off. lets say you have a form with a method of post. If register globals is off, to access the variables from the form, instead of using $name, you'd have to use $_POST['name']

If you have a variable (var_name) in the url, and want to use it in your script, if register globals was on you could just do $var_name to access it. If register globals is off, you'd need to use $_GET['var_name'] since any variable in the URL has a method of GET.

$HTTP_POST_VARS is an older version of $POST
$HTTP_GET_VARS is an older version of $GET

Here is some more reading on all of this:

http://www.php.net/manual/en/security.registerglobals.php
http://www.php.net/manual/en/configuration.directives.php#ini.register-globals

And here are the predefined variables you'd need to use if register globals was set to off.

http://www.php.net/manual/en/reserved.variables.php

If register globals is off, you have to use $_POST['var_name']

if register globals is on, either $var_name or $_POST['var_name'] will work.

Hope this helps.

Cgraz

[Radon3k]

Ahh there we go. That's what I wanted to know. Thanks, sir! 🙂