// guess tax register if not set
if (!isset($reg_type))
$reg_type = in_array($trans_type, array(ST_SUPPINVOICE, ST_SUPPCREDIT)) ? TR_OUTPUT
- : in_array($trans_type, array(ST_SALESINVOICE, ST_CUSTCREDIT)) ? TR_INPUT : null;
+ : (in_array($trans_type, array(ST_SALESINVOICE, ST_CUSTCREDIT)) ? TR_INPUT : null);
$sql = "INSERT INTO ".TB_PREF."trans_tax_details
(trans_type, trans_no, tran_date, tax_type_id, rate, ex_rate,