Getting list IPs from CIDR notation in PHP

Question

Is there a way (or function/class) to get the list of IP addresses from a CIDR notation?

For example, I have 73.35.143.32/27 CIDR and want to get the list of all IP\

Answer 1

There is small fix - when someone place ip prefix like: 127.0.0.15/26 this function returns bad last IP adress. In this function is at line 4 (starts: $range[1]...) changed $cidr[0] to $range[0] - now its return last IP address good for every IP in range.

function cidrToRange($cidr) {
  $range = array();
  $cidr = explode('/', $cidr);
  $range[0] = long2ip((ip2long($cidr[0])) & ((-1 << (32 - (int)$cidr[1]))));
  $range[1] = long2ip((ip2long($range[0])) + pow(2, (32 - (int)$cidr[1])) - 1);
  return $range;
}
var_dump(cidrToRange("127.0.0.15/26"));

Before fix:

array(2) {
  [0]=>
  string(9) "127.0.0.0"
  [1]=>
  string(10) "127.0.0.78"
}
string(41) "127.0.0.15/26 >> 2130706432 -> 2130706510"

After fix:

array(2) {
  [0]=>
  string(9) "127.0.0.0"
  [1]=>
  string(10) "127.0.0.63"
}
string(41) "127.0.0.15/26 >> 2130706432 -> 2130706495"