The article has been updated successfully.Please see below for an example of how to calculate the x_fp_hash value using the SHA1 approach in PHP.
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<!--
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>
Hosted Checkout: Sample PHP Payment Form with SHA-1
</title>
<style type="text/css">
label {
display: block;
margin: 5px 0px;
color: #AAA;
}
input {
display: block;
}
input[type=submit] {
margin-top: 20px;
}
</style>
</head>
<body>
<h1>
Hosted Checkout: Sample PHP Payment Form with SHA-1
</h1>
<form action="https://checkout.e-xact.com/pay" method="POST">
<?
$x_login = "WSP-#####-##"; // Take from Payment Page ID in Payment Pages interface
$transaction_key = "#############"; // Take from Payment Pages configuration interface
$x_amount = "595.99";
$x_currency_code = "CAD"; // Needs to agree with the currency of the payment page
srand(time()); // initialize random generator for x_fp_sequence
$x_fp_sequence = rand(1000, 100000) + 123456;
$x_fp_timestamp = time(); // needs to be in UTC. Make sure webserver produces UTC
// The values that contribute to x_fp_hash
$hmac_data = $x_login . "^" . $x_fp_sequence . "^" . $x_fp_timestamp . "^" . $x_amount . "^" . $x_currency_code;
$x_fp_hash = hash_hmac('SHA1', $hmac_data, $transaction_key);
echo ('<label>x_login</label><input name="x_login" value="' . $x_login . '">' );
echo ('<label>x_amount</label><input name="x_amount" value="' . $x_amount . '">' );
echo ('<label>x_fp_sequence</label><input name="x_fp_sequence" value="' . $x_fp_sequence . '">' );
echo ('<label>x_fp_timestamp</label><input name="x_fp_timestamp" value="' . $x_fp_timestamp . '">' );
echo ('<label>x_fp_hash (with SHA-1)</label><input name="x_fp_hash" value="' . $x_fp_hash . '" size="50">' );
echo ('<label>x_currency_code</label><input name="x_currency_code" value="' . $x_currency_code . '">');
?>
<input type="hidden" name="x_show_form" value="PAYMENT_FORM"/>
<input type="hidden" name="x_test_request" value="TRUE"/>
<input type="submit" value="Pay with Hosted Checkout"/>
</form>
</body>
</html>
-->
Sample Code: PHP example for calculating HMAC SHA1
Article Details
Last Updated
5th of March, 2010
