本篇內(nèi)容主要講解“PHP怎么生成圖表pChart”,感興趣的朋友不妨來(lái)看看。本文介紹的方法操作簡(jiǎn)單快捷,實(shí)用性強(qiáng)。下面就讓小編來(lái)帶大家學(xué)習(xí)“PHP怎么生成圖表pChart”吧!
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pChart是一個(gè)開源的圖表生成庫(kù),主要涉及3個(gè)Class:pChart.class, pData.class, pCache.class,可生成20多種簡(jiǎn)單或復(fù)雜的圖表,支持PNG,JPG,GIF通用圖片格式。數(shù)據(jù)源可以來(lái)自于Database,CSV,當(dāng)然也可以手寫。使用該程序PHP需要開啟GD服務(wù),先來(lái)看看pChart的工作流程:
主要分為三步:
* 讀取用于生成圖表數(shù)據(jù)(數(shù)據(jù)庫(kù)、文件)
* 設(shè)計(jì)圖表樣式(圓角、底色等)
* 制作標(biāo)簽、題目、圖例并生成圖表
下面看一個(gè)簡(jiǎn)單的柱狀圖表:
代碼如下:
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(shù)據(jù)圖例 $DataSet->SetSerieName("Microsoft","Serie1"); $DataSet->SetSerieName("IBM","Serie2"); $DataSet->SetSerieName("Google","Serie3"); // Initialise the graph $Test = new pChart(700,230); //設(shè)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(biāo)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 ''; ?>
這個(gè)是雷達(dá)效果的:
代碼:
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(dá)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 ''; ?>
再看幾個(gè)其他的效果
1,餅圖:
2, 雙座標(biāo)曲線圖:
3, 層疊柱狀圖:
4, 多圖表:
圖表的種類已經(jīng)相當(dāng)豐富了,具體圖表設(shè)置請(qǐng)參考
http://pchart.sourceforge.net/documentation.php?topic=pChart
::源代碼下載:::
http://xiazai.jb51.net/202007/yuanma/pChart_jb51.rar
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