open-redirect

<?php
//Code not fixt
if (array_key_exists ("redirect", $_GET) && $_GET['redirect'] != "") {
	header ("location: " . $_GET['redirect']);
	exit;
}

http_response_code (500);
?>
<p>Missing redirect target.</p>
<?php
exit;
?>

<?php
//code fixted

if (array_key_exists ("redirect", $_GET) && is_numeric($_GET['redirect'])) {
	switch (intval ($_GET['redirect'])) {
		case 1:
			$target = "info.php?id=1";
			break;
		case 2:
			$target = "info.php?id=2";
			break;
		case 99:
			$target = "https://digi.ninja";
			break;
	}
	if ($target != "") {
		header ("location: " . $target);
		exit;
	} else {
		?>
		Unknown redirect target.
		<?php
		exit;
	}
}