how to update database through populated drop down menu in php

[kunal choudhary]

I want to know how to update a database by editing of retrieval through populated drop down menu.after searching a lot it could not work.so please help me.

<?php
while($row1 = @mysql_fetch_array($aCustomer,MYSQL_ASSOC))
{
echo "&nbsp;&nbsp;&nbsp;head &nbsp;<input type='text' name='head' value='".$row1['head']."'><br/><br/>";
echo "&nbsp;&nbsp;&nbsp;description &nbsp;<input type='text' name='description' value='".$row1['description']."'><br/><br/>";
echo "&nbsp;&nbsp;&nbsp;file no &nbsp;<input type='varchar' name='fileno' value='".$row1['fileno']."'><br/><br/>";
echo "&nbsp;&nbsp;&nbsp;Name of firm &nbsp;<input type='text' name='Nameoffirm' value='".$row1['Nameoffirm']."'><br/><br/>";
echo "&nbsp;&nbsp;&nbsp;exp &nbsp;<input type='int' name='exp' value='".$row1['exp']."'><br/><br/>";
echo "&nbsp;&nbsp;&nbsp;date of sanction &nbsp;<input type='date' name='dateofsanction' value='".$row1['dateofsanction']."'><br/><br/>";
echo "&nbsp;&nbsp;&nbsp;date of po &nbsp;<input type='date' name='dateofpo' value='".$row1['dateofpo']."'><br/><br/>";
echo "&nbsp;&nbsp;&nbsp;date of indent &nbsp;<input type='date' name='dateofindent' value='".$row1['dateofindent']."'><br/><br/>";
echo "&nbsp;&nbsp;&nbsp;bill no &nbsp;<input type='int' name='billno' value='".$row1['billno']."'><br/><br/>";
echo "&nbsp;&nbsp;&nbsp;date of bill no &nbsp;<input type='date' name='dateofbillno' value='".$row1['dateofbillno']."'><br/><br/>";
echo "&nbsp;&nbsp;&nbsp;BLno &nbsp;<input type='int' name='BLno' value='".$row1['BLno']."'><br/><br/>";
echo "&nbsp;&nbsp;&nbsp;bill pass &nbsp;<input type='varchar' name='billpass' value='".$row1['billpass']."'><br/><br/>";
echo "&nbsp;&nbsp;&nbsp;bill amount &nbsp;<input type='int' name='billamt' value='".$row1['billamt']."'><br/><br/>";
echo "&nbsp;&nbsp;&nbsp;date of bill &nbsp;<input type='date' name='dateofbill' value='".$row1['dateofbill']."'><br/><br/>";
echo "&nbsp;&nbsp;&nbsp;available bal &nbsp;<input type='int' name='availbal' value='".$row1['availbal']."'><br/><br/>";
echo "&nbsp;&nbsp;&nbsp;progressive bal &nbsp;<input type='int' name='progbal' value='".$row1['progbal']."'><br/><br/>";
echo "&nbsp;&nbsp;&nbsp;remark &nbsp;<input type='varchar' name='remark' value='".$row1['remark']."'><br/><br/>";
$head   = $row1['head'];
$description = $row1['description'];
$fileno   = $row1['fileno'];
$Nameoffirm   = $row1['Nameoffirm'];
$exp   = $row1['exp'];
$dateofsanction   = $row1['dateofsanction'];
$dateofpo  = $row1['dateofpo'];
$indentno  = $row1['indentno'];
$dateofindent   = $row1['dateofindent'];
$billno   = $row1['billno'];
$dateofbillno   = $row1['dateofbillno'];
$BLno   = $row1['BLno'];
$billpass   = $row1['billpass'];
$billamt  = $row1['billamt'];
$dateofbill   = $row1['dateofbill'];
$availbal  = $row1['availbal'];
$progbal   = $row1['progbal'];
$remark   = $row1['remark'];

?>
<?php } ?>


</table>
</td>
</tr>
<?php } ?>

<form method="post">

<?php
if(isset($_POST['update']))
{
$dbhost = 'localhost';
$dbuser = 'root';
$dbpass = '';
$dbname = "purchase";
$conn = mysql_connect($dbhost, $dbuser, $dbpass);
mysql_select_db($dbname) or die(mysql_error());
if(! $conn )
{
  die('Could not connect: ' . mysql_error());
}
$qry_result= mysql_query("SELECT RCtotal FROM nfcurrent") or die(mysql_error());
$row=mysql_fetch_array($qry_result);
$num=$row[RCtotal];

$description2 = $_POST['description'];

$fileno2=$_POST['fileno'];

$indentno2 = $_POST['indentno'];

$dateofindent2=$_POST['dateofindent'];

$billno2 = $_POST['billno'];

$dateofbillno=$_POST['dateofbillno'];;

$BLno2 = $_POST['BLno'];
$billpass2 = $_POST['billpass'];
$billamt2 = $_POST['billamt'];
$dateofbill2=$_POST['dateofbill'];

$remark2 = $_POST['remark'];
$availbal=$num;
$progbal=$num-$billamt;

$sql = "UPDATE nfone
       SET indentno ='$indentno2',
           dateofindent = '$dateofindent2',
           billno = '$billno2',
           dateofbillno = '$dateofbillno2',
           BLno = '$BLno2',
           billpass = '$billpass2',
           billamt = '$billamt2',
           dateofbill = '$dateofbill2',
		   availbal = '$num',
		   progbal = '$progbal'
           
     WHERE fileno = '$fileno'";

	  
mysql_select_db('purchase');
$retval = mysql_query( $sql, $conn );
$RC=$progbal;
$sqla = "UPDATE nfcurrent
       SET RCtotal = '$progbal'";
	   $retvala = mysql_query( $sqla);
if(! $retval )
{
  die('Could not update data: ' . mysql_error());
}

echo "Updated data successfully\n";

mysql_close($conn);
}
else

?>
<input name="update" type="submit" id="update" value="Update">
</form>
</table>
</form>
</body>
</html>