PHP传参一直出错，求大神帮助

Question

我希望在php文件中，利用jpgraph生成统计饼图。
假定$data_array = array(10,20,30,40,50);

所以我希望在主文件写标签

然后在 graph.php中
用
<?php
$data = $_GET['data'];
?>
是不是此时$data
就是那个数组了？

但是我怎么做，最后图片都不能正常生成显示！

 <?php
    $data = $_GET['data'];
    $legends = array("Jan1","Feb2","Mar3","Apr4","May5");
    require_once('./jpgraph/src/jpgraph.php');  
    require_once('./jpgraph/src/jpgraph_pie.php');  
    //数据  

    //图像部分不要轻易修改  
    // Create the Pie Graph.  
    $graph = new PieGraph(400,400);  
    $graph->SetShadow();  
    // Set A title for the plot  
    $graph->title->Set(iconv("UTF-8","GB2312//IGNORE","统计图"));  
    $graph->title->SetFont(FF_SIMSUN,FS_BOLD);  

    $p1 = new PiePlot($data);  
    $p1->value->SetFont(FF_SIMSUN,FS_BOLD);  
    $p1->value->SetColor("darkred");  
    $p1->SetSize(0.3);  
    $p1->SetCenter(0.4); 


    $p1->SetLegends($legends);  
    $graph->Add($p1);      //Add（）将图形添加到图像上  
    $graph->Stroke();
?>

Answer 1

先看看图片路径，对照项目结构检查