function chat_update($chat_log)
{
  if(file_exists($chat_log))
  {
    include "parse_html.php";
    $buffer_array = array();
    $line_count = 0;
    $buffer = file_get_contents($chat_log);
    $buffer = explode("<~![-=#i(o)i#=-]!~>\r\n", $buffer);

    // Get index from which to start displaying entries, then create new array
    $display_num = 25;

    if (count($buffer) > $display_num)
    {
      $buffer = array_slice($buffer, -($display_num + 1));
    }

    foreach($buffer as $newline)
    {
      $newline = explode("<~![-=#i(i)i#=-]!~>", $newline);
      $count = 0;
      foreach($newline as $message)
      {
        if($count == 0)
        {
          $buffer_array[$line_count][0] = format($message)."<br />";
          $count = 1;
        } 
        else
        {
          $message = $parser -> parse_smileys($message);
          $message = $parser -> parse_icons($message);
          $buffer_array[$line_count][1] = format($message);
          $count = 0;
        }
      }
      $line_count++;
    }
    foreach($buffer_array as $key => $message)
    {
      if(!empty($buffer_array[$key]) && !empty($message[0]) && !empty($message[1]))
      {
        echo "<div style=\"border: 1px solid #000000; margin: 3px; padding: 3px; background-color: #EEEEEE;\">";
        echo $message[0].$message[1];
        echo "</div>";
      }
    }
  }
  else echo "No chat history availble!";
}