JpGraph簡(jiǎn)介

JpGraph是開(kāi)源的PHP統(tǒng)計(jì)圖表生成庫(kù)，基于PHP的GD2圖形庫(kù)構(gòu)建，把生成統(tǒng)計(jì)圖的相關(guān)操作封裝，隱藏了部分復(fù)雜的操作，使在PHP頁(yè)面上輸出統(tǒng)計(jì)圖表變得更加容易。JpGraph的官方網(wǎng)站為：http://jpgraph.net，開(kāi)發(fā)者可以在上面免費(fèi)下載最新版的JpGraph和閱讀相關(guān)幫助文檔或示例程序。

相關(guān)學(xué)習(xí)推薦：PHP編程從入門(mén)到精通

JpGraph的配置

（1）修改文件php.ini

在include_path中添加jpgraph的目錄路徑，并將jpgraph解壓后的src目錄名稱(chēng)更改為jpgraph。

（2）檢查PHP是否支持GD庫(kù)

在php.ini文件中找到語(yǔ)句;extension=php_gd2.dll。把上述語(yǔ)句前的;號(hào)去掉，即去掉注釋。如果因?yàn)镻HP版本不同而找不到此語(yǔ)句，則可直接添加extension=php_gd2.dll

（3）修改文件jpgraph_gb2312.php

找到函數(shù)：function gb2utf8($gb)

把函數(shù)修改為：

  function gb2utf8($gb) {
  return $gb;
  }

即不使用gb2編碼方式轉(zhuǎn)utf8方式的那段代碼。

折線圖

<?php 
require_once ("jpgraph/jpgraph.php"); 
require_once ("jpgraph/jpgraph_line.php"); 

$data1 = array(523,634,371,278,685,587,490,256,398,545,367,577); //第一條曲線的數(shù)組 

$graph = new Graph(500,300);  
$graph->SetScale("textlin"); 
$graph->SetShadow();   
$graph->img->SetMargin(60,30,30,70); //設(shè)置圖像邊距 

$graph->graph_theme = null; //設(shè)置主題為null，否則value->Show(); 無(wú)效 

$lineplot1=new LinePlot($data1); //創(chuàng)建設(shè)置兩條曲線對(duì)象 
$lineplot1->value->SetColor("red"); 
$lineplot1->value->Show(); 
$graph->Add($lineplot1); //將曲線放置到圖像上 

$graph->title->Set("CDN流量圖");  //設(shè)置圖像標(biāo)題 
$graph->xaxis->title->Set("月份"); //設(shè)置坐標(biāo)軸名稱(chēng) 
$graph->yaxis->title->Set("流 量(Gbits)"); 
$graph->title->SetMargin(10); 
$graph->xaxis->title->SetMargin(10); 
$graph->yaxis->title->SetMargin(10); 

$graph->title->SetFont(FF_SIMSUN,FS_BOLD); //設(shè)置字體 
$graph->yaxis->title->SetFont(FF_SIMSUN,FS_BOLD); 
$graph->xaxis->title->SetFont(FF_SIMSUN,FS_BOLD);  
$graph->xaxis->SetTickLabels($gDateLocale->GetShortMonth()); 
$graph->Stroke(); //輸出圖像 
?>

柱狀圖

<?php 
require_once ("jpgraph/jpgraph.php"); 
require_once ("jpgraph/jpgraph_bar.php"); 

$data = array(19,23,34,38,45,67,71,78,85,87,96,145);      
$ydata = array("一","二","三","四","五","六","七","八","九","十","十一","十二"); 

$graph = new Graph(500,300); //創(chuàng)建新的Graph對(duì)象 
$graph->SetScale("textlin"); //刻度樣式 
$graph->SetShadow();     //設(shè)置陰影 
$graph->img->SetMargin(40,30,40,50); //設(shè)置邊距 

$graph->graph_theme = null; //設(shè)置主題為null，否則value->Show(); 無(wú)效 

$barplot = new BarPlot($data); //創(chuàng)建BarPlot對(duì)象 
$barplot->SetFillColor('blue'); //設(shè)置顏色 
$barplot->value->Show(); //設(shè)置顯示數(shù)字 
$graph->Add($barplot); //將柱形圖添加到圖像中 

$graph->title->Set("CDN流量圖");  
$graph->xaxis->title->Set("月份"); //設(shè)置標(biāo)題和X-Y軸標(biāo)題 
$graph->yaxis->title->Set("流 量(Mbits)");                                    
$graph->title->SetColor("red"); 
$graph->title->SetMargin(10); 
$graph->xaxis->title->SetMargin(5); 
$graph->xaxis->SetTickLabels($ydata); 

$graph->title->SetFont(FF_SIMSUN,FS_BOLD); //設(shè)置字體 
$graph->yaxis->title->SetFont(FF_SIMSUN,FS_BOLD); 
$graph->xaxis->title->SetFont(FF_SIMSUN,FS_BOLD); 
$graph->xaxis->SetFont(FF_SIMSUN,FS_BOLD); 
$graph->Stroke(); 
?>

餅狀圖

<?php 
require_once ("jpgraph/jpgraph.php"); 
require_once ("jpgraph/jpgraph_pie.php"); 
require_once ("jpgraph/jpgraph_pie3d.php"); 

$data = array(19,23,34,38,45,67,71,78,85,87,90,96); 

$graph = new PieGraph(550,500); 
$graph->SetShadow(); 

$graph->title->Set("CDN流量比例"); 
$graph->title->SetFont(FF_SIMSUN,FS_BOLD); 

$pieplot = new PiePlot3D($data); //創(chuàng)建PiePlot3D對(duì)象 
$pieplot->SetCenter(0.4, 0.5); //設(shè)置餅圖中心的位置 
$pieplot->SetLegends($gDateLocale->GetShortMonth()); //設(shè)置圖例 
$graph->Add($pieplot); 
$graph->Stroke(); 
?>

總結(jié)

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