Sequenza di ip da un range

[dottwatson]

non è voluto l' effetto

ecco il codice completo

function iprange($start,$stop,$range=1)
  {
  $reverse=false;
  $out=array();
  
  if (intval(str_replace(".","",$stop)) < 
      intval(str_replace(".","",$start))) 
    {
    $tmp=$start;
    $start=$stop;
    $stop=$tmp;
    $reverse= true;
    }

  list($start_1,$start_2,$start_3,$start_4)=explode(".",$start);
  //list($stop_1,$stop_2,$stop_3,$stop_4)=explode(".",$stop);
  
  for ($a=$start_1; $a <= 255; $a+=$range)
    for ($b=$start_2; $b <= 255; $b+=$range)
      for ($c=$start_3; $c <= 255; $c+=$range)
        for ($d=$start_4; $d <= 255; $d+=$range)
          {
          $str="$a.$b.$c.$d";
          $out[]=$str;
          if ($str == $stop)
            {
            if ($reverse==true) array_reverse($out);
            return $out;
            }
          }
  return $out;
  }


echo "<pre>";
$res=iprange('10.0.2.121','10.0.0.120');
print_r($res);