$APILoginID = ’21KgNu47Wc’;
$SecureTransactionKey = ’78i8bDSQ’;
$hash_method=’md5′;
$totalamount = “1.00”;
$method = ‘sale’;
$version = ‘1.0’;
$ordernumber = ‘1’;
date_default_timezone_set(“America/Chicago”);
$unixtime = strtotime(gmdate(‘Y-m-d H:i:s’));
$millitime = microtime(true) * 1000;
$utc = number_format(($millitime * 10000) + 621355968000000000 , 0, ‘.’, ”);
$customer_token = ”;
$paymethod_token = ”;
$data = “$APILoginID|$method|$version|$totalamount|$utc|$ordernumber|$customer_token|$paymethod_token”;
$hash = hash_hmac(‘md5’,$data,$SecureTransactionKey);