pChart是一個開源的圖表產生庫，主要涉及3個Class：pChart.class, pData.class, pCache.class，可產生20多種簡單或複雜的圖表，支援PNG，JPG，GIF通用圖片格式。資料來源可以來自於Database，CSV，當然也可以手寫。使用該程式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程式設計從入門到精通
主要分為三個步驟：
- * 讀取用於產生圖表資料（資料庫、檔案）
- * 設計圖表樣式（圓角、底色等）
- * 製作標籤、題目、圖例並產生圖表
下面看一個簡單的長條圖表：
##程式碼如下：
<?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.'">';
?>登入後複製
這個是雷達效果的：
#程式碼：
<?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.'">';
?>登入後複製
再看幾個其他的效果
1，圓餅圖：
#2, 雙座標曲線圖：
#3, 層疊長條圖：
4, 多圖表：
圖表的種類已經相當豐富了，具體圖表設定請參考
http://pchart.sourceforge.net/documentation.php?topic=pChart
::原始碼下載::：
http://xiazai.jb51.net/202007/yuanma/pChart_jb51.rar
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