Динамическое добавление поля и дальнейшая обработка введенной информации

<?php
$conn=mysql_connect("localhost","root","");
$database = "test";
if (!$conn ||!mysql_select_db($database,$conn))
{ exit(mysql_error ());
}
$kv=1;
$vid=$_POST['item1'];
 
$query = mysql_query("select
a.kv, a.vid, concat(a.dolya,a.sostav) as sostav, a.zapas, a.diam, a.klass,
(select 100*b.krup from tovarnost as b where a.sostav=b.poroda and a.klass=b.tovar and a.diam=b.deam) as krup,
(select 100*b.sredn from tovarnost as b where a.sostav=b.poroda and a.klass=b.tovar and a.diam=b.deam)as sred,
(select 100*b.melkay from tovarnost as b where a.sostav=b.poroda and a.klass=b.tovar and a.diam=b.deam)as melkay,
(select 100*b.drova from tovarnost as b where a.sostav=b.poroda and a.klass=b.tovar and a.diam=b.deam)as drova,
(select 100*b.othod from tovarnost as b where a.sostav=b.poroda and a.klass=b.tovar and a.diam=b.deam)as othod,
100 as summa
from taxsaz as a
where a.kv=$kv and a.vid=$vid");
$row=mysql_fetch_array($query);
do {
 
echo "<tr><td>";
echo $row['kv'];
echo "</td><td>";
echo $row['vid'];
echo "</td><td>";
echo $plo;
echo "</td><td>";
echo $row['zapas'];
echo "</td><td>";
echo $row['klass'];
echo "</td><td>";
echo $row['sostav'];
echo "</td><td>";
echo $row['diam'];
echo "</td><td>";
echo $row['zapas'];
echo "</td><td>";
echo $row['vid'];
echo "</td><td>";
echo $row['krup'];
echo "</td><td>";
echo $row['sred'];
echo "</td><td>";
echo $row['melkay'];
echo "</td><td>";
echo $row['drova'];
echo "</td><td>";
echo $row['drova'];
echo "</td><td>";
echo $row['othod'];
echo "</td><td>";
echo $row['summa'];
echo "</td></tr>";
}
while($row=mysql_fetch_array($query))
 
?>