public function pie_chart($piedata, $legentdata, $title)
{
require_once 'Examples/jpgraph/jpgraph.php';
require_once 'Examples/jpgraph/jpgraph_pie.php';
require_once 'Examples/jpgraph/jpgraph_pie3d.php';
$graph = new PieGraph(800, 450);
$graph->SetShadow();
$graph->title->SetFont(FF_SIMSUN, FS_BOLD, 12);
// 设置中文字体
$graph->title->Set($title . "饼状图");
$graph->SetFrame(false);
$p1 = new PiePlot3D($piedata);
$p1->SetSize(0.4);
$p1->SetCenter(0.3);
$p1->SetLegends($legentdata);
$p1->SetLabelMargin(10);
$graph->legend->SetFont(FF_SIMSUN, FS_NORMAL);
$graph->legend->Pos(0.03, 0.18, 'right', 'top');
$graph->legend->SetLayout(LEGEND_HOR);
$graph->legend->SetColumns(2);
$graph->legend->SetVColMargin(0);
$graph->Add($p1);
$graph->SetImgFormat('png', 90);
$graph->Stroke();
}
