Changing random results to ASC or DSC

I have a script that randomizes results. I have tried to convert code to display a constant result, ascending or descending while in session. I can't seem to convert script due to session value and $rand_num = rand(1,$total_rows - 1);

//index.[php]


$query = "SELECT * FROM ".$quiz;
$sql = mysql_query($query);
$total_rows = mysql_num_rows($sql);
$i=0;
array($rand_arr);
while($i < $_SESSION['quiz_total_question'])
{
$rand_num = rand(1,$total_rows - 1);
if(!@array_search($rand_num,$rand_arr))
{

$rand_arr[$i] = $rand_num;
$i++;
}
}
global $quiz_data;
for($i=0;$i < $_SESSION['quiz_total_question'];$i++)
{
$query = "SELECT * FROM ".$quiz." WHERE id = ".$rand_arr[$i];
$sql = mysql_query($query);
$quiz_data[$i] = mysql_fetch_array($sql);

}
$_SESSION['quiz_data']=$quiz_data;
//print_r($quiz_data);
}
elseif(isset($_POST['next_step']))
{
$error = "Some of the fields are left empty !";
header('Location: index.[php]?menu=setup');
}