Graph::ErrorText PHP 메소드

    protected function ErrorText($error)
    {
        $text = array('x' => $this->pad_left, 'y' => $this->height - 3);
        $style = array('font-family' => 'monospace', 'font-size' => '12px', 'font-weight' => 'bold');
        $e = $this->ContrastText($text['x'], $text['y'], $error, 'blue', 'white', $style);
        return $e;
    }