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HomeBackend DevelopmentPHP Tutorialphp中jpgraph库的使用

用Jpgraph,只要了解它的一些内置函数,可以轻松得画出折线图、柱形图、饼状图等图表。


  首先要保证PHP打开了Gd2的扩展:


  打开PHP.ini,定位到extension=php_gd2.dll,把前面的分号删掉。


  然后下载Jpgraph,http://www.aditus.nu/jpgraph/,解压到一个文件夹中。如 d:\wamp\www\jpgraph。


  打开PHP.ini,修改include_path参数,增加Jpgraph的路径,如include_path=",;d:\wamp\www\jpgraph",重启Apache服务。

  这样环境就配好了

      下面是一个使用的例子

   include("./jpgraph/src/jpgraph.php");              //Graph 类
   include("./jpgraph/src/jpgraph_line.php");         //LinePlot类


   $graph = new  Graph(400, 300);//创建新的Graph对象
   $graph->SetScale("textlin");//设置刻度样式
   $graph->img->SetMargin(30,30,80, 30);//设置图标边界
   $graph->title->Set("Year to Date Cost");//设置图标标题


   //绘制曲线
   //将要用于图表创建的数据存放在数组中
   $data = array(19,23,34,38,45,67,71,78,85,87,90.96);
   $lineplot = new LinePlot($data);
   $lineplot->SetLegend("Amount(M dollars)");
   $lineplot->SetColor("green");


   //讲曲线放在图表中
   $graph->Add($lineplot);
    
   //输出图表
   $graph->Stroke();
?>


下面是结果:



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