PHP jpgraph库的配置及生成统计图表:折线图、柱状图、饼状图等

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

<?phprequire_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

<?phprequire_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

这里的风景美不胜收，真让人流连忘返。