if ( $row = $db->sql_fetchrow($result) )
   {
      do
      {
         $orig_word[] = '#\b(' . str_replace('\*', '\w*?', preg_quote($row['word'], '#')) . ')\b#i';
         $replacement_word[] = $row['replacement'];
      }
      while ( $row = $db->sql_fetchrow($result) );
   }

   return true;
}

// Filter supplied string on supplied bad words, except for users with moderator
// privilege, who get to see the original bad words highlighted instead
function replace_bad_words(&$orig_word, &$replacement_word, &$string)
{
   global $is_auth;

   // don't bother if no bad words defined
   if ( ! count($orig_word) )
   {
      return;
   }

   if ( $is_auth['auth_mod'] )
   {
      $string = preg_replace($orig_word, '<span class="badwordhighlight">' . "\\1" . '</span>', $string);
   }
   else
   {
      $string = preg_replace($orig_word, $replacement_word, $string);
   }
}

/* Highlight bad words for moderators instead of censoring them */
span.badwordhighlight {
   background-color: #FFFF00;
}

if ( count($orig_word) )
{
   $topic_title = preg_replace($orig_word, $replacement_word, $topic_title);
}

replace_bad_words($orig_word, $replacement_word, $topic_title);

if ( count($orig_word) )
{
   $vote_info[$i]['vote_option_text'] = preg_replace($orig_word, $replacement_word, $vote_info[$i]['vote_option_text']);
}

replace_bad_words($orig_word, $replacement_word, $vote_info[$i]['vote_option_text']);

if ( count($orig_word) )
{
   $vote_info[$i]['vote_option_text'] = preg_replace($orig_word, $replacement_word, $vote_info[$i]['vote_option_text']);
}

replace_bad_words($orig_word, $replacement_word, $vote_info[$i]['vote_option_text']);

replace_bad_words($orig_word, $replacement_word, $vote_title);

if ( count($orig_word) )
{
   if ( $user_sig != '' )
   {
      $user_sig = preg_replace($orig_word, $replacement_word, $user_sig);
   }

   $post_subject = preg_replace($orig_word, $replacement_word, $post_subject);
   $message = preg_replace($orig_word, $replacement_word, $message);
}

   if ( $user_sig != '' )
   {
      replace_bad_words($orig_word, $replacement_word, $user_sig);
   }

   replace_bad_words($orig_word, $replacement_word, $post_subject);
   replace_bad_words($orig_word, $replacement_word, $message);

/* Highlight bad words for moderators instead of censoring them */
span.badwordhighlight {
   background-color: #FFFF00;
    color: #FF0000;
    font-weight: bold;