Tried to set cookie

session_dialog.php

@@ -276,6 +276,7 @@ function handle_postcode_modal($data)
         ]);
         exit();
     }
+    $cookie_val = postcode_in_range($params["postcode"]).'|'.$params["postcode"].'|'.$straatnaam.'|'.$params["huisnummer"].'|'.$woonplaats.'|';
 
     // 6. Succes: Sessie opslaan & response
     $_SESSION["postcode"] = $params["postcode"];
@@ -284,12 +285,18 @@ function handle_postcode_modal($data)
     $_SESSION["woonplaats"] = $woonplaats;
     $_SESSION["postcode_is_local"] = postcode_in_range($params["postcode"]);
 
+    setcookie("PPPR", $cookie_val, [
+    'expires' => time() + 3600,
+    'path' => '/',
+    'domain' => $_SERVER['SERVER_NAME'],
+    'secure' => true,   // Required for cross-origin fetch
+    'httponly' => true, // Prevents JavaScript access (XSS protection)
+    'samesite' => 'Lax' // Use 'None' for cross-origin, requires secure=true
+    ]);
+
     echo json_encode([
         "status" => "success",
         "message" => "all good",
-        "straatnaam" => $straatnaam,
-        "woonplaats" => $woonplaats,
-        "lokaal_tarief" => postcode_in_range($params["postcode"]),
     ]);
     exit();
 }