member management by admin using php

<h2><?php echo "User list"; ?></h2>

        <table border="0" cellpadding="0" cellspacing="0">
                <tr bgcolor="#f87820">
                        <td><img src="img/blank.gif" alt="" width="10" height="25"></td>
                        <td class="tabhead"><img src="img/blank.gif" alt="" width="150" height="6"><br><b><?php echo "first name"; ?></b></td>
                        <td class="tabhead"><img src="img/blank.gif" alt="" width="150" height="6"><br><b><?php echo "lastname name"; ?></b></td>
                        <td class="tabhead"><img src="img/blank.gif" alt="" width="150" height="6"><br><b><?php echo "member id"; ?></b></td>
                        <td class="tabhead"><img src="img/blank.gif" alt="" width="50" height="6"><br><b><?php echo "delete"; ?></b></td>
                        <td><img src="img/blank.gif" alt="" width="10" height="25"></td>
                </tr>

                <?php

                                                }

                        $result=mysql_query("SELECT member_id,firstname,lastname,login FROM members ORDER BY firstname");
                        $i = 0;
                        while($row = mysql_fetch_array($result)) {
                                if ($i > 0) {
                                        echo "<tr valign='bottom'>";
                                        echo "<td bgcolor='#ffffff' height='1' style='background-image:url(img/strichel.gif)' colspan='6'></td>";
                                        echo "</tr>";
                                }
                                echo "<tr valign='middle'>";
                                echo "<td class='tabval'><img src='img/blank.gif' alt='' width='10' height='20'></td>";
                                echo "<td class='tabval'><b>".$row['lastname']."</b></td>";
                                echo "<td class='tabval'>".$row['firstname']." </td>";
                                echo "<td class='tabval'>".$row['member_id']." </td>";

                                echo "<td class='tabval'><a onclick="return </span></a></td>";
                                echo "<td class='tabval'></td>";
                                echo "</tr>";
                                $i++;
                        }

                ?>

        </table>


in this i wanna add tho more things in the table 1 to delete a member and 2 to have approved or denied option for that i made two functiom

below code is to delete

if($_REQUEST['action']=="del")
{
$memberId = mysql_real_Escape_string($_REQUEST['member_id']);
mysql_query("DELETE FROM members WHERE member_id=$memberId");
}

echo '<td><a href="http://yourwebsite/yourscriptname.php?action=del&member_id='
   . htmlspecialchars($row['member_id']) . '">Delete</a>';
if ($row['approved'] == 0) {
    echo '&nbsp;<a href="http://yourwebsite/yourscriptname.php?action=approve&member_id='
       . htmlspecialchars($row['member_id']) . '">Approve</a>';
}
echo '</td>';

$member_id = 0;
if (isset($_GET['member_id'])) $member_id = intval($_GET['member_id']);
$action = '';
if (isset($_GET['action'])) $action = $_GET['action'];

$sql = '';
switch($action) {
case 'approve':
    $sql = "UPDATE members SET approval = 1 WHERE member_id = $member_id";
    break;
case 'delete':
    $sql = "DELETE FROM member WHERE member_id = $member_id";
    break;
}
if (!empty($sql) && !empty($member_id)) {
    // execute the sql.
}