PHP生成各种统计图表pChart的实例

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PHP生成各种统计图表pChart的实例


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:

1.jpg


主要分为三步:

* 读取用于生成图表数据(数据库、文件)

* 设计图表样式(圆角、底色等)

* 制作标签、题目、图例并生成图表

下面看一个简单的柱状图表:

1.jpg

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="'.$imageFile.'">';
?>


这个是雷达效果的:

1.jpg


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="'.$imageFile.'">';
?>



再看几个其他的效果 

1,饼图:

https://img.jbzj.com/file_images/article/202007/2020073117000539.jpg


2, 双座标曲线图:

https://img.jbzj.com/file_images/article/202007/2020073117000540.jpg


3, 层叠柱状图:

https://img.jbzj.com/file_images/article/202007/2020073117000641.jpg


4, 多图表:

https://img.jbzj.com/file_images/article/202007/2020073117000742.jpg


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