PHP jpgraph库的配置及生成统计图表:折线图、柱状图、饼状图等

版权声明：本文为博主郎涯工作室原创文章，未经博主允许不得转载。

JpGraph简介

      JpGraph是开源的PHP统计图表生成库，基于PHP的GD2图形库构建，把生成统计图的相关操作封装，隐藏了部分复杂的操作，使在PHP页面上输出统计图表变得更加容易。JpGraph的官方网站为：http://jpgraph.net，开发者可以在上面免费下载最新版的JpGraph和阅读相关帮助文档或示例程序。



JpGraph的配置
（1）修改文件php.ini
      在include_path中添加jpgraph的目录路径，并将jpgraph解压后的src目录名称更改为jpgraph。





（2）检查PHP是否支持GD库

      在php.ini文件中找到语句;extension=php_gd2.dll。把上述语句前的;号去掉，即去掉注释。如果因为PHP版本不同而找不到此语句，则可直接添加extension=php_gd2.dll
 
（3）修改文件jpgraph_gb2312.php
找到函数：function gb2utf8($gb)
把函数修改为：
   function gb2utf8($gb) {
    return $gb;
 
    }

即不使用gb2编码方式转utf8方式的那段代码。



折线图

[php]
view plain
copy
print?

<?php  
require_once ("jpgraph/jpgraph.php");  
require_once ("jpgraph/jpgraph_line.php");  
   
$data1 = array(523,634,371,278,685,587,490,256,398,545,367,577); //第一条曲线的数组  
   
$graph = new Graph(500,300);   
$graph->SetScale("textlin");  
$graph->SetShadow();     
$graph->img->SetMargin(60,30,30,70); //设置图像边距  
   
$graph->graph_theme = null; //设置主题为null，否则value->Show(); 无效  
   
$lineplot1=new LinePlot($data1); //创建设置两条曲线对象  
$lineplot1->value->SetColor("red");  
$lineplot1->value->Show();  
$graph->Add($lineplot1);  //将曲线放置到图像上  
   
$graph->title->Set("CDN流量图");   //设置图像标题  
$graph->xaxis->title->Set("月份"); //设置坐标轴名称  
$graph->yaxis->title->Set("流 量(Gbits)");  
$graph->title->SetMargin(10);  
$graph->xaxis->title->SetMargin(10);  
$graph->yaxis->title->SetMargin(10);  
   
$graph->title->SetFont(FF_SIMSUN,FS_BOLD); //设置字体  
$graph->yaxis->title->SetFont(FF_SIMSUN,FS_BOLD);  
$graph->xaxis->title->SetFont(FF_SIMSUN,FS_BOLD);   
$graph->xaxis->SetTickLabels($gDateLocale->GetShortMonth());  
  
$graph->Stroke();  //输出图像  
?>  



柱状图

[php]
view plain
copy
print?

<?php  
require_once ("jpgraph/jpgraph.php");  
require_once ("jpgraph/jpgraph_bar.php");  
  
$data  = array(19,23,34,38,45,67,71,78,85,87,96,145);           
$ydata = array("一","二","三","四","五","六","七","八","九","十","十一","十二");  
  
$graph = new Graph(500,300);  //创建新的Graph对象  
$graph->SetScale("textlin");  //刻度样式  
$graph->SetShadow();          //设置阴影  
$graph->img->SetMargin(40,30,40,50); //设置边距  
  
$graph->graph_theme = null; //设置主题为null，否则value->Show(); 无效  
  
$barplot = new BarPlot($data);  //创建BarPlot对象  
$barplot->SetFillColor('blue'); //设置颜色  
$barplot->value->Show(); //设置显示数字  
$graph->Add($barplot);  //将柱形图添加到图像中  
   
$graph->title->Set("CDN流量图");   
$graph->xaxis->title->Set("月份"); //设置标题和X-Y轴标题  
$graph->yaxis->title->Set("流 量(Mbits)");                                                                        
$graph->title->SetColor("red");  
$graph->title->SetMargin(10);  
$graph->xaxis->title->SetMargin(5);  
$graph->xaxis->SetTickLabels($ydata);  
   
$graph->title->SetFont(FF_SIMSUN,FS_BOLD);  //设置字体  
$graph->yaxis->title->SetFont(FF_SIMSUN,FS_BOLD);  
$graph->xaxis->title->SetFont(FF_SIMSUN,FS_BOLD);  
$graph->xaxis->SetFont(FF_SIMSUN,FS_BOLD);  
  
$graph->Stroke();  
?>  



饼状图

[php]
view plain
copy
print?

<?php  
require_once ("jpgraph/jpgraph.php");  
require_once ("jpgraph/jpgraph_pie.php");  
require_once ("jpgraph/jpgraph_pie3d.php");  
   
$data = array(19,23,34,38,45,67,71,78,85,87,90,96);  
   
$graph = new PieGraph(550,500);  
$graph->SetShadow();  
   
$graph->title->Set("CDN流量比例");  
$graph->title->SetFont(FF_SIMSUN,FS_BOLD);  
   
$pieplot = new PiePlot3D($data);  //创建PiePlot3D对象  
$pieplot->SetCenter(0.4, 0.5); //设置饼图中心的位置  
$pieplot->SetLegends($gDateLocale->GetShortMonth()); //设置图例  
  
$graph->Add($pieplot);  
$graph->Stroke();  
?>