How to calculate multiplication value inside the while loop in PHP?

Question

I have one while loop which displays data from the database. Now I want multiply two values in one row and display the result in the same row, the same way multiply the values

Answer 1

you can try

printf('amount is %d',$row['item'] * $row['amount']);

reference

Answer 2

From Where you are getting $rr1??

You can have

echo "<td>" . $row['item'] * $row['amount'] . "</td>";

Hope this is what you want...

Answer 3

Try below :

 while($row = mysql_fetch_array($result))
    {
       echo "<tr>";
       echo "<td class='alt'>" . $row['id'] . "</td>";
       echo "<td>" . $row['item'] . "</td>";
       echo "<td>" . $row['amount'] . "</td>";
       echo "<td>" .($row['item'] * $row['amount']). "</td>";
       echo "</tr>";
     }

Answer 4

Change the query as

$result= mysql_query("Select id, item, amount, (item * amount)  total
 from table_name");

then in while loop

while($row = mysql_fetch_array($result))
    {
       echo "<tr>";
       echo "<td >" . $row['id'] . "</td>";
       echo "<td>" . $row['item'] . "</td>";
       echo "<td>" . $row['amount'] . "</td>";
       echo "<td>" .($row['total']  "</td>";
       echo "</tr>";
     }