如何删除url中的id

Question

now i face a problem with user will see the popout with "update sucessfully" if he reload the page or backward to the page.Anyone having idea of how to remove ?id=2 after click ok on pop out?
Here is my code:

update_action.php

$updresult = mysqli_query($conn, $sqlu);

    if (!$updresult)
        echo "Unable to update record". mysqli_error($conn);
    else
    {
        header('Location: index.php?id=2' );
        mysqli_close($conn);
    } 
    ?>

index.php

if ($id == 1) 
    {
    ?>
        <script>
            alert("Invalid user name or password, Try again");
        </script>
    <?php   
    }
        else if($error_id == 2)
    {
    ?>
        <script>
            alert("Update Sucessfully!"); 
        </script>
    <?php
    }

the url show index.php?id=2

Answer 1

if ($id == 1) 
{
?>
    <script>
        alert("Invalid user name or password, Try again");
    </script>
<?php   
}
    else if($error_id == 2)
{
?>
    <script>
        alert("Update Sucessfully!"); 
 //---------- added ---------------
        window.location.href= 'index.php';
 //-------------------------

    </script>
<?php
}