Обновление данных в базе данных

while ($row = mysql_fetch_array($res)) {
    echo "<form action=up.php method=post>";
    echo "<tr>\n";
    echo "<td><input type = text name=ID_client value=".htmlspecialchars($row['ID_client'],ENT_QUOTES)."></td>\n";
    echo "<td><input type = text name=name_client value=".htmlspecialchars($row['name_client'],ENT_QUOTES)."></td>\n";
    echo "</tr>\n";
    echo '<tr><td colspan=2 align=center><input type=submit name=update value=ввести ></td></tr>';
    echo "</form>";
}

<?
include "connect.php";
if (isset($_POST['vvod'])) {
 
$ID_client=$_POST['ID_client'];
$name_client=$_POST['name_client'];
 
 
mysql_query("UPDATE bd1.clients SET name_client='$name_client' WHERE ID_client=".$ID_client);
}
header("Location: eduction.php");
 
?>

WHERE ID_client=".$ID_client

echo "UPDATE bd1.clients SET name_client='$name_client' WHERE ID_client=".$ID_client;

exit("UPDATE bd1.clients SET name_client='$name_client' WHERE ID_client=".$ID_client);

<?
include "connect.php";
if (isset($_POST['vvod'])) {
 
$ID_client=$_POST['ID_client'];
$name_client=$_POST['name_client'];
 
 
exit("UPDATE bd1.clients SET name_client='$name_client' WHERE ID_client=".$ID_client);
}
header("Location: eduction.php");
 
?>