if (date('w', $timestamp) == 1 && $day != 0) {
                $key = date('M j', $timestamp);
                $bar = $bar_highlight;
            }
            break;
        case 90:
            $key = $day;
            if (date('j', $timestamp) == 1 && $day < -3) {
                $key = date('M j', $timestamp);
                $bar = $bar_highlight;
            }
            break;
    }
    $data[$key] = $bar;
}
class Graph extends GDGraph
{
    function _get_specs($data, $type)
    {
        $result = parent::_get_specs($data, $type);
        $max = $result['max_value'];
        $max = (int) ceil($max / 10.0) * 10;
        return array('min_value' => 0, 'max_value' => $max);
    }
}
$t_variable = gettext($variable);
$t_last = gettext('last');
$t_days = gettext('days');
$gdg = new Graph(250, 250, "{$t_variable} ({$t_last} {$days_word} {$t_days})", 255, 255, 255, 0, 0, 0, 0, 0, 0, false);
$gdg->bar_graph($data, '', '', $days_back == 7 ? 80 : 100, 5);