Non repeatable random numbers php function

// $nrs = range($from,$to) - There you can set the compartment of your numbers e.g. range(10,992);
// $from == which number will be the lowest possibility
// $to == which number will be the highest possibility
// $scope == how many numbers from ($from,$to) will be displayed

function rnum($scope) {

  $nrs = range(1,70);
  $nr = array_rand($nrs,$scope);
  shuffle($nr);

  for ($i=0;$i<=$ilosc-1;$i=$i+1) {
    if($i==0) $liczby = $nrs[$nr[$i]]; 
    else $liczby = $liczby.";".$nrs[$nr[$i]];
  } return($liczby);

}

//Display the random numbers

$numbers = explode(";",rnum(5)); //Explode the numbers to get an array 
echo $numbers[0]."<br>"; // Display the generated numbers
echo $numbers[1]."<br>";
echo $numbers[2]."<br>";
echo $numbers[3]."<br>";
echo $numbers[4]."<br>";

//!Warning the $scope can't be highter than the difference between $from,$to