Trying to learn how this works for a simple security need I have.
Nothing serious, hence this experiment.
My code:
if (!isset($_SERVER['PHP_AUTH_USER']))
{
header('WWW-Authenticate: Basic realm="My Realm"');
header('HTTP/1.0 401 Unauthorized');
echo '<h3>You have chosen not to signin<br><br>';
echo "Click <a href='/index.php'>here</a> to go back to the menu";
unset($_SERVER['PHP_AUTH_USER']);
unset($_SERVER['PHP_AUTH_PW']);
unset($_ENV['PHP_AUTH_USER']);
unset($_ENV['PHP_AUTH_PW']);
exit;
}
else
{
echo "checking creds<br>";
if ($_SERVER['PHP_AUTH_USER'] <> "validuser")
{
unset($_SERVER['PHP_AUTH_USER']);
unset($_SERVER['PHP_AUTH_PW']);
unset($_ENV['PHP_AUTH_USER']);
unset($_ENV['PHP_AUTH_PW']);
echo '<h3>You have entered invalid information.<br><br>';
echo "Click <a href='/index.php'>here</a> to go back to the menu";
exit();
}
}
(if we get here we have signed on)
(....continue on with script)
*******
My problem is trying to remove the invalid credentials (unsets) so that
when the user attempts to access the page again, the signin dialog gets
displayed. On my second attempt I always get the "invalid" path and
never get a chance to re-enter the credentials.
What am I missing (besides it's a lousy security solution)?
Can one NOT unset a SERVER variable? How does one get around that in
this case if so?
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