stopping multiple registers.

Anon

I was wondering if there is a quick fix to stop someone from pushing the back button on their browser after they have registered at my site. Basically if they hit the register button and are directed into the password protected pages I don't want them to be able to get back to the previous register page and change stuff. I tried using this code but it always directs to to the warning page no matter if the variable is registered or not.

if (session_is_registered ( "username" ) )
$query = "ok";
if ( $query != ok)
{
header( "Location: /warning.php" );
}

Thanks

Anon

where are you registering this session variable? if you register it at the top of the page, this will never work.

but, more importantly is
if (session_is_registered ( "username" ) )

which basically does nothing.

also you set $query = "ok" and then check to see if $query != ok (without the quotes)

to get the desired effect, change this to

if (session_is_registered("username"))
{
header("Location: /warning.php");
}