PHP Manual . ... Next . PHP 4 >= 4.0.5) cybermut_creerreponsecm -- Generate the acknowledgement of delivery of the confirmation of payment . string cybermut_creerreponsecm ( string phrase) . cybermut_creerreponsecm() returns a string containing delivery acknowledgement message. The parameter is "OK" if the message of confirmation of the payment was correctly identified by cybermut_testmac() . Any other chain is regarded as an error message. ... cybermut_testmac . ...