pfSense

			$input_errors[] = $result;

// DHCP-Options logic-check

    $servers = explode(';', $post['dhcp_dns']);

      foreach ($servers as $server) if (!is_ipaddr($server)) 

        {$input_errors[] = 'The field \'DHCP-Opt.: DNS-Server\' must contain a valid IP address and no whitespaces.';

    $servers = explode(';', $post['dhcp_wins']);

      foreach ($servers as $server) if (!is_ipaddr($server)) 

        {$input_errors[] = 'The field \'DHCP-Opt.: WINS-Server\' must contain a valid IP address and no whitespaces.';

    $servers = explode(';', $post['dhcp_nbdd']);

      foreach ($servers as $server) if (!is_ipaddr($server)) 

        {$input_errors[] = 'The field \'DHCP-Opt.: NBDD-Server\' must contain a valid IP address and no whitespaces.';

    $servers = explode(';', $post['dhcp_ntp']);

      foreach ($servers as $server) if (!is_ipaddr($server)) 

        {$input_errors[] = 'The field \'DHCP-Opt.: NTP-Server\' must contain a valid IP address and no whitespaces.';

	}