JpGraph簡介

JpGraph是開源的PHP統(tǒng)計(jì)圖表生成庫，基于PHP的GD2圖形庫構(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目錄名稱更改為jpgraph。

（2）檢查PHP是否支持GD庫

在php.ini文件中找到語句;extension=php_gd2.dll。把上述語句前的;號去掉，即去掉注釋。如果因?yàn)镻HP版本不同而找不到此語句，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(); 無效   $lineplot1=new LinePlot($data1); //創(chuàng)建設(shè)置兩條曲線對象  $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  $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(); 無效   $barplot = new BarPlot($data); //創(chuàng)建BarPlot對象  $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();  ?>