dice.php

<?php
function nassau_dice_filter($o) {
        $preg = '/\[dice=(?<num>\d*)[kd](?<dice>\d+)\]((?<res>[^\[]*)\[\/dice\])?/i';

        $o->Msg = preg_replace_callback($preg, 'nassau_dice_parse', $o->Msg);
}
function nassau_dice_parse($m) {
  if (false == empty($m['res'])) return $m[0];

  $dice = $m['dice'];
  $num = $m['num'] ? $m['num'] : 1;
  
  $sum = array ();
  foreach (range(1, $num) as $_) $sum[] = rand(1, $dice);
  $sum = implode(', ', $sum) . ' » ' . array_sum($sum);
  
  return sprintf('[dice=%dd%d]%s[/dice]', $num, $dice, $sum);
}

function nassau_dice_format(&$data) {
  $msg = $data['message'];
  $rep = preg_replace('/\[dice=(\d*[kd]\d+)\]([^\[]+)\[\/dice\]/i',
        '<span style="background:#0080FF;color:white;padding:1px 4px;border-radius:6px;">Rolled [$1]: $2</span>',
        $msg);
  
  $data['message'] = $rep;
}

UnbRegisterHook('post.beforeadd', 'nassau_dice_filter');
UnbRegisterHook('post.beforechange', 'nassau_dice_filter');
UnbRegisterHook('post.postparse', 'nassau_dice_format');

gistfile1.txt

$ grep -A 5 -B 5 post.before post.lib.php   
        $this->AttachDLCount = 0;
        $this->IP = $_SERVER['REMOTE_ADDR'];
        $this->Hostname = gethostbyaddr($_SERVER['REMOTE_ADDR']);
        $this->SpamRating = $SpamRating;

        UnbCallHook('post.beforeadd', $this);

        $ok = $this->db->AddRecord(array(
                        'ID' => $this->ID,
                        'Thread' => $this->Thread,
                        'ReplyTo' => $this->ReplyTo,
--
                        $this->EditCount++;
                }
                $this->EditReason = $EditReason;   // always store edit reason, but maybe not always show it
        }

        UnbCallHook('post.beforechange', $this);

        $arr = array('Subject' => $this->Subject,
                'Msg' => $this->Msg,
                'Options' => $this->Options,
                'SpamRating' => $this->SpamRating);