Forms and registering variables??

offseri

Hi all!

I need some help on dealing with variables from forms. This is basically what I have now:

<form>
<input type="radio" name="continent" value="asia">Asia<br>
<input type="radio" name="continent" value="australia">Aust<br>
<input type="radio" name="continent" value="sAmerica">Sout<br>
<input type="radio" name="continent" value="africa">Africa

<? session_register("continent")?>
</form>

This site links to another but when I try to echo $continent on the other side nothing happens. I am not exactly sure what I am doing wrong here. So can someone correct me and post a useful link where I can read more about dealing with variables on forms?
Thanks!

drew010

sessions dont work across multiple domains, but if you post that form to a php script on another domain, it should be able to access the continent the user chose by printing out $_POST['continent']

offseri

drew010 wrote:
sessions dont work across multiple domains, but if you post that form to a php script on another domain, it should be able to access the continent the user chose by printing out $_POST['continent']

I agree.. but in this case it is the same domain. I would like to use the $SESSION[] and $POST[] arrays but nothing gets displayed. This is what I ended up with:

****SITE1***********

<?
$_SESSION["continent"] = $continent;
?>
</form>
...ending tags for body and html
***SITE2**************

print $_SESSION["continent"];

...end tags

What is wrong here??

drew010

if you wish to use sessions, [man]session_start[/man] must be called before you attempt to create or access any session variables.

also, in your first page, $continent doesnt exist because php doesnt know what they chose until the form is submitted.

on page 2 you just want to have in there

<?php

session_start();

$_SESSION['continent'] = $_POST['continent'];

?>

bpat1434

Wow....

Umm when are you submitting the form? If you don't submit the form, then you can't get the variable into the session...

Try this:

<?php
if(!isset($_POST) || empty($_POST['continent']))
{
// show the form
?>
<html> <head></head>
<body>

<form method="POST" action="site2.php">
<input type="radio" name="continent" value="asia" onClick="this.form.submit()">Asia<br>
<input type="radio" name="continent" value="australia" onClick="this.form.submit()">Aust<br>
</form>

</body>
</html>
<?php
}
else
{
// They've submitted the form, now le'ts put the variable into the session, 
// and move them to the next script
session_start();
$_SESSION['continent'] = $_POST['continent'];
header("Location: site2.php");
}
?>

~Brett

offseri

Almost there! I do have a button that I forgot to post... this is the complete code for both sites:

****SITE1***********
<? session_start(); ?>
<html> <head></head>
<body>

***SITE2**************
<? session_start(); ?>

At this point it still doesnt echo anything on the screen. However bpat's code works just fine except the button that i have calls a js function validateForm which checks if the user has selected one continent and if true redirects them to site2 with window.location("site2").
What am I still missing??

drew010

if you use window.location it will not post the contents of the form, it will just redirect them to the page. i beleive that is the problem.