PHP and Java produce different HMAC encryption secret

PHP hash_hmac function (http://php.net/manual/en/function.hash-hmac.php) produces different key since Java interprets it binary as default. By setting true to raw_out flag, it resolves the differences.

/*
 * Get encoded secret 
 */
function getHmacEncode($message, $key) {
  $secret = hash_hmac('sha256', $message, $key, true);
  return base64_encode($secret);
}