PHP利用pChart开源项目生成图表

openkk 12年前

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：

PHP利用pChart开源项目生成图表

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：

PHP利用pChart开源项目生成图表

代码如下：

// 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,,7,4),"Serie1");   $DataSet->AddPoint(array(3,3,-4,1,-2,2,1,,-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,,2,TRUE);   $Test->drawGrid(4,TRUE,230,230,230,50);     // Draw the 0 line   $Test->setFontProperties("Fonts/MankSans.ttf",6);   $Test->drawTreshold(,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 '.$imageFile.'">';?>

这个是雷达效果的：

PHP利用pChart开源项目生成图表

代码：

// 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(,22,"Example",50,50,50,400);      $imageFile = "example8.png";   $Test->Render($imageFile);   echo '.$imageFile.'">';?>