function maintenance_exempt_ip_cidr_check in Maintenance Exempt 8

Helper function to check against CIDR.

Thanks claudiu - http://www.php.net/manual/en/ref.network.php#74656

Parameters

string $ip: The IP address to check.

string $cidr: The netmask in CIDR notation.

Return value

bool TRUE if the IP address matches.

1 call to maintenance_exempt_ip_cidr_check()

maintenance_exempt_by_cidr_notation in ./maintenance_exempt.module

Check if an IP address using CIDR notation should be exempt.

File

./maintenance_exempt.module, line 158

Allow exemption from maintenance mode.

Code

function maintenance_exempt_ip_cidr_check($ip, $cidr) {
  [
    $net,
    $mask,
  ] = explode("/", $cidr);
  $ip_net = ip2long($net);
  $ip_mask = ~((1 << 32 - $mask) - 1);
  $ip_ip = ip2long($ip);
  $ip_ip_net = $ip_ip & $ip_mask;
  return $ip_ip_net == $ip_net;
}