Hi,
Just to explain a point on my previous post:
If at the top of your page that processes the registration info, you
include:
session_start();
session_register("is_registered");
is_registered="yes";
and then use this test:
if($PHPSESSID)
{
warning, redirect to login
}
else
{
record info, redirect to login
}
Will the condition in the if statement be true? It seems like it should
because you started the session. But a session id is a cookie, and a cookie
is not available on the page it is set. So, the first time this script is
encountered, e.g. when they register for the first time, even though you
started the session, the if statement condition will be false, indicating
the first time someone is registering. Subsequently, if someone uses the
back button and then clicks submit to get to this page again, then the
cookie will be set, and the if statement will return true, causing the other
branch of the if statement to execute.
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