PHP jpgraph库的配置及生成统计图表:折线图、柱状图、饼状图

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：，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 
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 
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 
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(); 
?> 

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