112402 EUR order label ALL 558 fr_FR issuerlogin@hipay.com value 1 Ruby 24 Rubin 24 558 1 "; /* * Var $data contain the XML string describing your order */ $data = trim($xml); // your website Hipay key $signKey = '584b575239a1b783e408c8e0c54aa4f0'; $encodedData = base64_encode($data); $md5Sign = md5($encodedData.$signKey); ?>