if(isset($_GET['id'])) {
    $qr_result = mysql_query("SELECT * from `users` ORDER BY `id` ASC");
}
        elseif(isset($_GET['name1'])) {
            $qr_result = mysql_query("SELECT * from `users` ORDER BY `first_name` DESC");}
        elseif(isset($_GET['surn'])) {
            $qr_result = mysql_query("SELECT * from `users` ORDER BY `surname` DESC");
        }
        elseif(isset($_GET['phone1'])) {
            $qr_result = mysql_query("SELECT * from `users` ORDER BY `phone_number` DESC");
        }
        while($data = mysql_fetch_array($qr_result))
        {
            echo '<tr>';
            echo '<td>' . $data[`id`] . '</td>';
            echo '<td>' . $data[`first_name`] . '</td>';
            echo '<td>' . $data[`surname`] . '</td>';
            echo '<td>' . $data[`phone_number`] . '</td>';
        }