include "library/tmn_gif.class.php";
$tw = new phaiwan_tmn_gif();

$redeem = json_decode($tw->redeem($_GET['link'], $_GET['phone']),true);
if ($xxx['status']['code'] == "SUCCESS") {
    $amount = number_format($xxx['data']['voucher']['amount_baht'], 0, '.', '');
    echo $amount." บาท";
    //code here 
} else {
    //error here
}