How to create a range of IP addresses?

Question

Suppose the input is:

222.123.34.45 and 222.123.34.55

then I need to output the ip address in between them:

222.123.34.45 222.123.34.46 ... 222.123.34.55

Answer 1

Use ip2long() and long2ip():

function ip_range($from, $to) {
  $start = ip2long($from);
  $end = ip2long($to);
  $range = range($start, $end);
  return array_map('long2ip', $range);
}

The above turns the two IP addresses into numbers (using PHP core functions), creates a range of numbers and then turns that number range into IP addresses.

If you want them separated by spaces just implode() the result.