I have a logic issue and I just can't figure it out ... pls help!

[phporcaffeine]

Okay,

 

I have a list of various ip address that are not in any particular order or form any particular subnet ... think of them as just random addresses.  Here is a sample:

 

193.122.140.196

193.122.140.192

212.209.042.128

193.132.159.000

203.166.028.064

156.070.222.001

218.104.051.160

194.034.064.001

194.034.065.001

194.034.066.001

194.034.067.001

199.068.016.000

067.111.075.099

212.044.025.206

212.044.008.034

195.102.024.074

193.122.140.207

212.209.042.135

193.132.159.255

203.166.028.127

156.070.222.255

218.104.051.174

 

Now I need to iterate over this list "somehow" to identify and group together, like addresses so I can express them by ranges.  For example:

 

193.122.140.207 and 193.122.159.255 would be expressed as 193.122.*.*

193.122.140.20 and 193.122.140.80 would be expressed as 193.122.140.20-80

 

I don't seem to be able to figure out how I would logically do it?  Any help or ideas?

 

Thanks in advance

[gevans]

Can you give me an example of how that list would look after you output it??

 

your example showed 2 different ways of parsing the ip's

[Psycho]

Yeah, you definitely need to provide more details. If you were to combine the two examples you posted what would the result be:

 

- 193.122.140.207

- 193.122.140.20

- 193.122.140.80

- 193.122.159.255

 

Would it be

- 193.122.140.20-207

- 193.122.159.255

 

Or just:

- 193.122.*.*

 

I would start by putting all of the IPs into multiple-dimensional arrays with each octet as a separate array element. Then sort by each octet. You would them have them in a logincal order to process - once you have clear rules for processing them.

[msinternet]

First step has to be putting them in an array and sorting them. Next I guess you would loop through and apply rules but we need more info on these.

 

Martin

[Caesar]

If I understood.....

 

<?php

function FormatIP($IP) {

  if(preg_match('/[0-9]+\.[0-9]+\.[0-9]+\.[0-9][0-9][0-9]/',$IP)) {
    $ip = preg_replace('/([0-9]+\.)([0-9]+\.)([0-9]+\.)([0-9]+)/','\\1\\2*.*',$IP);
  }
    else
    {
      $ip = str_replace(' ','',preg_replace('/([0-9]+\.)([0-9]+\.)([0-9]+\.)([0-9]+)/','\\1\\2\\3 20-80',$IP)); 
    }

  return $ip;
}

//$ip = '192.168.0.100';  <-- This will return 192.168.*.*
//$ip = '192.168.0.10'; <-- This will return 192.168.0.20-80

$p =  FormatIP($ip);

?>