how to generate random number between given two number

$max = 1.0;
    $min = 0.0;
    for($i=0;$i<100;$i++)
    {
        print ("<br>");
        $range = $max-$min;
        $num = $min + $range * mt_rand(0, 32767)/32767;    
        $num = round($num, 2);    
        print ((float) $num);
    }