<?php

 # PHP_IRC_IPv4_Encode(ip string);
 # binary safe
 #
 # Description: Convert an IPv4 address to an ID for abuse tracking.
 #
 # Returns: Returns ID.

 function PHP_IRC_IPv4_Encode($ip) {

  $allowed = array (
   '0' => true,
   '1' => true,
   '2' => true,
   '3' => true,
   '4' => true,
   '5' => true,
   '6' => true,
   '7' => true,
   '8' => true,
   '9' => true
  );

  $size = strlen($ip);
  $j=0;
  for ($i=0;$i<$size;$i++) {
   if (@$allowed[$ip[$i]]) {
    $ipblocks[$j] .= $ip[$i];
   }
   elseif($ip[$i] == '.') {
    $j++;
   }
   else {
    return null;
   }
  }

  if (
   count(@$ipblocks) == 4 &&
   strlen(@$ipblocks['0']) >= 1 &&
   strlen(@$ipblocks['1']) >= 1 &&
   strlen(@$ipblocks['2']) >= 1 &&
   strlen(@$ipblocks['3']) >= 1 &&
   ($ipblocks['0']['0'] != '0' || (strlen($ipblocks['0']) == 1 && $ipblocks['0']['0'] == '0')) &&
   ($ipblocks['1']['0'] != '0' || (strlen($ipblocks['1']) == 1 && $ipblocks['1']['0'] == '0')) &&
   ($ipblocks['2']['0'] != '0' || (strlen($ipblocks['2']) == 1 && $ipblocks['2']['0'] == '0')) &&
   ($ipblocks['3']['0'] != '0' || (strlen($ipblocks['3']) == 1 && $ipblocks['3']['0'] == '0')) &&
   strlen(@$ipblocks['0']) <= 3 &&
   strlen(@$ipblocks['1']) <= 3 &&
   strlen(@$ipblocks['2']) <= 3 &&
   strlen(@$ipblocks['3']) <= 3 &&
   $ipblocks['0'] >= 0 &&
   $ipblocks['1'] >= 0 &&
   $ipblocks['2'] >= 0 &&
   $ipblocks['3'] >= 0 &&
   $ipblocks['0'] <= 255 &&
   $ipblocks['1'] <= 255 &&
   $ipblocks['2'] <= 255 &&
   $ipblocks['3'] <= 255
  ) {

   $idblocks[] = str_pad(base_convert($ipblocks['0'], 10, 16), 2, '0', STR_PAD_LEFT);
   $idblocks[] = str_pad(base_convert($ipblocks['1'], 10, 16), 2, '0', STR_PAD_LEFT);
   $idblocks[] = str_pad(base_convert($ipblocks['2'], 10, 16), 2, '0', STR_PAD_LEFT);
   $idblocks[] = str_pad(base_convert($ipblocks['3'], 10, 16), 2, '0', STR_PAD_LEFT);

   $id = $idblocks[0].$idblocks[1].$idblocks[2].$idblocks[3];

   return $id;

  }

 }

 # Ver 0.0.4$

?>