function debug($note = null)
{
  static $start_time = NULL;
  static $start_code_line = 0;
  global $debugf;
  $call_info = array_shift( debug_backtrace() );
  $code_line = $call_info['line'];
  $file = array_pop( explode('/', $call_info['file']));
  if( $start_time === NULL )
  {
      $debug = "debug: ".$note." ".$file."> initialize</br>";
      $start_time = time() + microtime();
      $start_code_line = $code_line;
      return 0;
  }
  $debugf .= sprintf("debug: %s %s> Line: %d-%d time: %.4f mem: %d KB</br>", $note, $file, $start_code_line, $code_line, (time() + microtime() - $start_time), ceil( memory_get_usage()/1024));
  $start_code_line = $code_line;
}
debug();
debug('All good'):
debug('Something whent wrong');
echo $debugf;