php图表,该如何处理

php图表
legend.php文件
include 'D:\\xampp\\htdocs\\php-ofc-library\\open-flash-chart.php';
$year = array();
$price = array();
$year[] = '1983';
$price[] = 36.7;
$year[] = '1984';
$price[] = 38.7;
$year[] = '1985';
$price[] = 42.8;
$year[] = '1986';
$price[] = 38.2;
$year[] = '1987';
$price[] = 37.8;
$year[] = '1988';
$price[] = 34.7;
$year[] = '1989';
$price[] = 38.4;
$year[] = '1990';
$price[] = 40.2;
$year[] = '1991';
$price[] = 39.5;
$year[] = '1992';
$price[] = 40.3;
$year[] = '1993';
$price[] = 45.9;
$year[] = '1994';
$price[] = 48.9;
$year[] = '1995';
$price[] = 50.9;
$year[] = '1996';
$price[] = 52.9;
$year[] = '1997';
$price[] = 57.9;
$year[] = '1998';
$price[] = 60.9;
$year[] = '1999';
$price[] = 61.9;
$year[] = '2000';
$price[] = 76.9;
$year[] = '2001';
$price[] = 77.9;
$year[] = '2002';
$price[] = 69.9;
$year[] = '2003';
$price[] = 77.9;
$year[] = '2004';
$price[] = 77.9;
$year[] = '2005';
$price[] = 79.9;
$year[] = '2006';
$price[] = 88.9;
$year[] = '2007';
$price[] = 87.9;
$year[] = '2008';
$price[] = 103.9;
$chart = new open_flash_chart();
$title = new title( 'UK Petrol price (pence) per Litre' );
$title->set_style( "{font-size: 20px; color: #A2ACBA; text-align: center;}" );
$chart->set_title( $title );
$area = new area();
$area->set_colour( '#5B56B6' );
$area->set_values( $price );
$area->set_key( 'Price', 12 );
$chart->add_element( $area );
$x_labels = new x_axis_labels();
$x_labels->set_steps( 2 );
$x_labels->set_vertical();
$x_labels->set_colour( '#A2ACBA' );
$x_labels->set_labels( $year );
$x = new x_axis();
$x->set_colour( '#A2ACBA' );
$x->set_grid_colour( '#D7E4A3' );
$x->set_offset( false );
$x->set_steps(4); // Add the X Axis Labels to the X Axis
$x->set_labels( $x_labels );
$chart->set_x_axis( $x ); // // LOOK: //
$x_legend = new x_legend( '1983 to 2008' );
$x_legend->set_style( '{font-size: 20px; color: #778877}' );
$chart->set_x_legend( $x_legend ); // // remove this when the Y Axis is smarter //
$y = new y_axis();
$y->set_range( 0, 150, 30 );
$chart->add_y_axis( $y );
echo $chart->toPrettyString();
json_encode($year);
json_encode($price);
?>

test.html文件

Hello World

用eclipse pdt开发，运行时提示
Open Flash Chart
JSON Parse Error [Syntax Error]
Error at character 0, line 1:
0:

php xampp eclipse

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