(PECL spplus >= 1.0.0)
Obtain a hmac key (needs 8 arguments)
string calcul_hmac ( string $clent, string $siretcode, string $price, string $reference, string $validity, string $taxation, string $devise, string $language )
Returns:
Returns TRUE on success or FALSE on failure.
This function is currently not documented; only its argument list is available.