Graph::TextLines PHP Method

    protected function TextLines($text, $x, $line_spacing)
    {
        $start_pos = -(count($text) - 1) / 2 * $line_spacing;
        $dy = $start_pos;
        $string = '';
        foreach ($text as $line) {
            $string .= $this->Element('tspan', array('x' => $x, 'dy' => $dy), NULL, $line);
            if ($dy == $start_pos) {
                $dy = $line_spacing;
            }
        }
        return $string;
    }