sanitizing array values

[sabret00the]

PHP Code:

    // sanitizing array values
    foreach($getpiece AS $key => $value)
    {
        if (!is_numeric($value))
        {
            if ($key == "pagetext")
            {
                $getpiece['$key'] = stripslashes(nl2br($getpiece[pagetext]));
            }
            else
            {
                $getpiece['$key'] = stripslashes($getpiece['$value']);
            }
        }
        else
        {
            $getpiece['$key'] = $getpiece['$value'];
        }
    } 


what am i doing wrong?