Jozskanak PHP

$q = "SELECT product_price, price_quantity_start, price_quantity_end, product_currency FROM #__{vm}_product_price
WHERE product_id='$product_id' AND shopper_group_id='".$default_shopper_group_id."' ORDER BY price_quantity_start";
$db->query( $q );
while( $db->next_record() ) {
    $prices_table .= "<tr class=\"sectiontableentry$i\"><td>".$db->f("price_quantity_start")." - ".$db->f("price_quantity_end")."</td>";
    $prices_table .= "<td>";
    if (!empty($my_taxrate)) {
        $prices_table .= $CURRENCY_DISPLAY->getFullValue( ($my_taxrate+1)*$db->f("product_price")*((100-$shopper_group_discount)/100) );
        $prices_table .= ', netto: ';
        $prices_table .= $CURRENCY_DISPLAY->getFullValue( $db->f("product_price")*((100-$shopper_group_discount)/100) );
    } else {
        $prices_table .= $CURRENCY_DISPLAY->getFullValue( $db->f("product_price")*((100-$shopper_group_discount)/100) );
    }
    $prices_table .= "</td></tr>";
    $i == 1 ? $i++ : $i--;