i güncelleme formu üzerinde çalışmak için çalışıyordu ben yanlış bir şey olduğunu gördük. Form iyi çalışıyor ama yeni veri veritabanına eklemek ama URL görünmüyor

code :

include"connection.php";

$gid = intval($_GET['id']);
$id = $_POST['product_id'];
$content = $_POST['content'];
$link = $_POST['link'];

if(isset($_POST['saveedit']) && $_POST['saveedit']=='products'){
    $update = mysql_query(" UPDATE products SET
                            content='$content',
                            link='$link'
                            WHERE product_id='$id' ") or die (mysql_error());

    if(isset($update)){
        echo "<b>update is done</b>";
    }
}

$query = mysql_query(" SELECT * FROM products WHERE product_id='".$gid."' ") or die (mysql_error());
$re = mysql_fetch_assoc($query);

if($_REQUEST['do'] == 'edit'){

echo"
<form action='".$_SERVER['PHP_SELF']."' metho='post'>
    <table>
    <tr>
    <td>Link : </td>
    <td><input type='text' name='link' value='".$re['link']."'/></td
    </tr>
    <tr>
    <td>Content :</td>
    <td><textarea name='content'>".$re['content']."</textarea></td>
    </tr>
    <tr>
    <td colspan='2'>
    <input type='submit' name='saveedit' value='save'/>
    <input type='hidden' name='id' value='".$gid."'/>
    <input type='hidden' name='productedit' value='products'/>
    </td>
    </tr>
    </table>
</form>
";
}

$data = mysql_query("SELECT * FROM products ORDER BY product_id");

echo"
    <table width='500' border='1'>
    <tr>
        <td>Link</td>
        <td>Content</td>
        <td>Option</td>
    </tr>
";

while($row = mysql_fetch_assoc($data)){
    echo"
        <tr>
        <td>".$row['link']."</td>
        <td>".$row['content']."</td>
        <td>
            <a href='edit.php?do=edit&id=".$row['product_id']."'> Edit </a>
        </td>
        </tr>
    ";
}
echo"</table>";

>