Redirect after hour change

Done to avoid situation where refreshing the page will
resubmit the form

index.php

@@ -52,6 +52,7 @@ $selectedHour = 13;
 $isLoggedIn = true;
 $accessToken = $_COOKIE['access_token'];
 $refreshToken = $_COOKIE['refresh_token'];
+$newHour = $_COOKIE['hour'];
 $customerNumber = '';
 $connectionId = '';
 $customerName = '';
@@ -231,7 +232,12 @@ if (!isset($accessToken) && !isset($refreshToken)) {
     try {
         getCustomerDetails($vars, $accessToken, $customerNumber, $connectionId, $customerName);
         getCurrentHour($vars, $accessToken, $customerNumber, $connectionId, $selectedHour);
-        $message = 'Select your hour of power.';
+        if ($newHour) {
+            $message = 'Done, changed to ' . $times[$newHour] . '.';
+            setcookie('hour', '', time() - 1000, "/");
+        } else {
+            $message = 'Select your hour of power.';
+        }
     } catch (Exception $exception) {
         if ($exception->getCode() === 401) {
             try {
@@ -265,7 +271,9 @@ if ($isLoggedIn && $_POST) {
     if ($isValid) {
         try {
             setCurrentHour($vars, $accessToken, $customerNumber, $connectionId, $selectedHour);
-            $message = 'Done. Hour changed to ' . $times[$selectedHour] . '.';
+            setcookie('hour', $selectedHour, time() + 30000, "/");
+            header('Location: /');
+            die();
         } catch (Exception $exception) {
             $message = $exception->getMessage();
         }