PHP生成图表pChart的示例解析

pChart是一个开源的图表生成库，主要涉及3个Class：pChart.class, pData.class, pCache.class，可生成20多种简单或复杂的图表，支持PNG，JPG，GIF通用图片格式。数据源可以来自于Database，CSV，当然也可以手写。使用该程序PHP需要开启GD服务，先来看看pChart的工作流程：

主要分为三步：

下面看一个简单的柱状图表：

代码如下：

<?php // Standard inclusions include('pChart/pData.class'); include('pChart/pChart.class'); // Dataset definition $DataSet = new pData; //图表数据 $DataSet->AddPoint(array(1,4,-3,2,-3,3,2,1,0,7,4),'Serie1'); $DataSet->AddPoint(array(3,3,-4,1,-2,2,1,0,-1,6,3),'Serie2'); $DataSet->AddPoint(array(4,1,2,-1,-4,-2,3,2,1,2,2),'Serie3'); $DataSet->AddAllSeries(); $DataSet->SetAbsciseLabelSerie(); //数据图例 $DataSet->SetSerieName('Microsoft','Serie1'); $DataSet->SetSerieName('IBM','Serie2'); $DataSet->SetSerieName('Google','Serie3'); // Initialise the graph $Test = new pChart(700,230); //设置图表尺寸、样式 $Test->setFontProperties('Fonts/tahoma.ttf',8); $Test->setGraphArea(50,30,680,200); $Test->drawFilledRoundedRectangle(7,7,693,223,5,240,240,240); $Test->drawRoundedRectangle(5,5,695,225,5,230,230,230); $Test->drawGraphArea(255,255,255,TRUE); $Test->drawScale($DataSet->GetData(),$DataSet->GetDataDescription(),SCALE_NORMAL,150,150,150,TRUE,0,2,TRUE); $Test->drawGrid(4,TRUE,230,230,230,50); // Draw the 0 line $Test->setFontProperties('Fonts/MankSans.ttf',6); $Test->drawTreshold(0,143,55,72,TRUE,TRUE); // Draw the bar graph //柱状图要使用drawBarGraph() $Test->drawBarGraph($DataSet->GetData(),$DataSet->GetDataDescription(),TRUE,80); // Finish the graph //制作图例、标题、字体等属性 $Test->setFontProperties('Fonts/MankSans.ttf',10); $Test->drawLegend(596,150,$DataSet->GetDataDescription(),255,255,255); $Test->setFontProperties('Fonts/MankSans.ttf',10); $Test->drawTitle(50,22,'Example',50,50,50,585); //生成图表 $imageFile = 'example12.png'; $Test->Render($imageFile); echo ’<img src='https://www.haobala.com/bcjs/’.$imageFile.’'>’;?>

这个是雷达效果的：

代码：

<?php // Standard inclusions include('pChart/pData.class'); include('pChart/pChart.class'); // Dataset definition $DataSet = new pData; $DataSet->AddPoint(array('Memory','Disk','Network','Slots','CPU'),'Label'); $DataSet->AddPoint(array(6,4,7,4,5),'Serie1'); $DataSet->AddPoint(array(2,3,5,2,4),'Serie2'); $DataSet->AddSerie('Serie1'); $DataSet->AddSerie('Serie2'); $DataSet->SetAbsciseLabelSerie('Label'); $DataSet->SetSerieName('Reference','Serie1'); $DataSet->SetSerieName('Tested computer','Serie2'); // Initialise the graph $Test = new pChart(400,400); $Test->setFontProperties('Fonts/tahoma.ttf',8); $Test->drawFilledRoundedRectangle(7,7,393,393,5,240,240,240); $Test->drawRoundedRectangle(5,5,395,395,5,230,230,230); $Test->setGraphArea(30,30,370,370); $Test->drawFilledRoundedRectangle(30,30,370,370,5,255,255,255); $Test->drawRoundedRectangle(30,30,370,370,5,220,220,220); // Draw the radar graph //要使用drawRadarAxis()生成雷达效果 $Test->drawRadarAxis($DataSet->GetData(),$DataSet->GetDataDescription(),TRUE,20,120,120,120,230,230,230); $Test->drawFilledRadar($DataSet->GetData(),$DataSet->GetDataDescription(),50,20); // Finish the graph $Test->drawLegend(15,15,$DataSet->GetDataDescription(),255,255,255); $Test->setFontProperties('Fonts/tahoma.ttf',10); $Test->drawTitle(0,22,'Example',50,50,50,400); $imageFile = 'example8.png'; $Test->Render($imageFile); echo ’<img src='https://www.haobala.com/bcjs/’.$imageFile.’'>’;?>

再看几个其他的效果

1，饼图：

2, 双座标曲线图：

3, 层叠柱状图：

4, 多图表：

图表的种类已经相当丰富了，具体图表设置请参考

http://pchart.sourceforge.net/documentation.php?topic=pChart

::源代码下载::：

http://xiazai.jb51.net/202007/yuanma/pChart_jb51.rar

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