function coupon_modifystock($id, $num)
{
global $_W;
$id = intval($id);
$num = intval($num);
$item = pdo_fetch('SELECT acid,id,card_id,quantity FROM ' . tablename('coupon') . ' WHERE uniacid = :aid AND id = :id', array(':aid' => $_W['uniacid'], ':id' => $id));
if (empty($item)) {
return error(-1, '卡券不存在或已经删除');
}
if (empty($item['card_id'])) {
return error(-1, '卡券id出错');
}
$num_tmp = $num - $item['quantity'];
$coupon = new coupon($item['acid']);
$return = $coupon->ModifyStockCard($item['card_id'], $num_tmp);
if (is_error($return)) {
return $return;
}
pdo_update('coupon', array('quantity' => $num), array('id' => $id, 'uniacid' => $_W['uniacid']));
return true;
}
