Need help w/ mysql_field_name function in form

Can anyone please give me some advice on why the code below doesn't show a name value. Everything else works fine (for example, the value field displays) so I think I'm connecting with the database. I'm trying to allow a user to edit a row of their data with POST from a displayed form. The problem might be with this line:

echo $field_name;


Here is the code:

<form action="process.php" method="POST">

<?

{$qry = "SELECT username, site, date, FROM home WHERE user_id='$session->user_id' ORDER BY date";
$res = mysql_query($qry);
$field_name = mysql_field_name($res, 0);}

{function mysql_fetch_all($res)

{while($row=mysql_fetch_array($res))

{$return[] = $row;}

return $return;}

function create_table($dataArr)


{echo "<form action=\"process.php\" method=\"POST\"><table><tr>";
for($j = 0; $j < 3; $j++)

{echo "<td><input type=\"text\" name=\"";

echo $field_name;

echo "\" maxlength=\"30\" value=" .$dataArr[$j]. "></td>";}

echo "<td><input type=\"hidden\" name=\"subedit\" value=\"1\"><input type=\"submit\" value=\"Update\"></td></tr></table></form>";}

$all = mysql_fetch_all($res);

echo "<table class='data_table'>";
echo "<tr><td colspan=\"3\"><h2>Current Profile</h2></td></tr>";
echo "<tr><small><td>Member&nbsp;</td><td>Site&nbsp;</td><td>Date&nbsp;</td></small></tr>";

for($i = 0; $i < count($all); $i++)

{create_table($all[$i]);}

echo "
</table>
</form>";

 

can you please clean you your code before you ask for the solution its really messy and difficult to understand the codes '{' used everywhere? sorry