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pChart是一個開源的圖表生成庫，主要涉及3個Class：pChart.class, pData.class, pCache.class，可生成20多種簡單或復雜的圖表，支持PNG，JPG，GIF通用圖片格式。數據源可以來自于Database，CSV，當然也可以手寫。使用該程序PHP需要開啟GD服務，先來看看pChart的工作流程：
相關學習推薦：PHP編程從入門到精通
主要分為三步：
- * 讀取用于生成圖表數據（數據庫、文件）
- * 設計圖表樣式（圓角、底色等）
- * 制作標簽、題目、圖例并生成圖表
下面看一個簡單的柱狀圖表：
代碼如下：
<?php // Standard inclusions include("pChart/pData.class"); include("pChart/pChart.class"); // Dataset definition $DataSet = new pData; //圖表數據 $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(); //數據圖例 $DataSet->SetSerieName("Microsoft","Serie1"); $DataSet->SetSerieName("IBM","Serie2"); $DataSet->SetSerieName("Google","Serie3"); // Initialise the graph $Test = new pChart(700,230); //設置圖表尺寸、樣式 $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 //柱狀圖要使用drawBarGraph() $Test->drawBarGraph($DataSet->GetData(),$DataSet->GetDataDescription(),TRUE,80); // Finish the graph //制作圖例、標題、字體等屬性 $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); //生成圖表 $imageFile = "example12.png"; $Test->Render($imageFile); echo '<img src="'.$imageFile.'">'; ?>
這個是雷達效果的：
代碼：
<?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()生成雷達效果 $Test->drawRadarAxis($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.'">'; ?>
再看幾個其他的效果
1，餅圖：
2, 雙座標曲線圖：
3, 層疊柱狀圖：
4, 多圖表：
圖表的種類已經相當豐富了，具體圖表設置請參考
http://pchart.sourceforge.net/documentation.php?topic=pChart
::源代碼下載::：
http://xiazai.jb51.net/202007/yuanma/pChart_jb51.rar
