$obj = new PenaltyCalculation(); $obj->init(); $mFailureToFilePenalty = $obj->mFailureToFilePenalty; $mFailureToPayPenalty = $obj->mFailureToPayPenalty; $mInterestPenalty = $obj->mInterestPenalty; $mAmountOwed = $obj->mAmountOwed; $test_json = array( "failureToFilePenalty" => $mFailureToFilePenalty, "failureToPayPenalty" => $mFailureToPayPenalty, "interestPenalty" => $mInterestPenalty, "amountOwed" => $mAmountOwed ); echo json_encode( $test_json );