php柱状图多系列动态实现

<?php
require_once 'data.php';
require_once 'jpgraph/src/jpgraph.php';
require_once"jpgraph/src/jpgraph_bar.php";
$arr1=$a->sum('answer','answer_id=1');
$arr2=$a->sum('answer','answer_id=2');
$arr3=$a->sum('answer','answer_id=3');
$arr4=$a->sum('answer','answer_id=4');
$arr5=$a->sum('answer','answer_id=5');
$arr6=$a->sum('answer','answer_id=6');
for($i=0;$i<10;$i++){
    $datay1[$i]=$arr1[$i]['numbers'];
    $datay2[$i]=$arr2[$i]['numbers'];
    $datay3[$i]=$arr3[$i]['numbers'];
    $datay4[$i]=$arr4[$i]['numbers'];
    $datay5[$i]=$arr5[$i]['numbers'];
    $datay6[$i]=$arr6[$i]['numbers'];
}
//设置显示的数据数组；
//调用类库
$x = array("1","2","3","4","5","6","7","8","9","10");
//设置图像的大小
$graph = new Graph(1000,500);  //创建新的Graph对象
$graph->SetScale("textlin");  //刻度样式
$graph->SetShadow();          //设置阴影
$graph->img->SetMargin(40,30,40,50); //设置边距
$graph->graph_theme = null; //设置主题为null，否则value->Show(); 无效
$ybplot1 = new BarPlot($datay1);  //创建BarPlot对象
$ybplot2 = new BarPlot($datay2);
$ybplot3 = new BarPlot($datay3);
$ybplot4 = new BarPlot($datay4);
$ybplot5 = new BarPlot($datay5);
$ybplot6 = new BarPlot($datay6);
$barplot = new GroupBarPlot(array($ybplot1,$ybplot2,$ybplot3,$ybplot4,$ybplot5,$ybplot6));
$ybplot1->SetFillColor('red'); //设置颜色
$ybplot2->SetFillColor('blue'); //设置颜色
$ybplot3->SetFillColor('green'); //设置颜色
$ybplot4->SetFillColor('gray'); //设置颜色
$ybplot5->SetFillColor('orange');
$ybplot6->SetFillColor('#000');
$ybplot1->value->Show(); //设置显示数字
$ybplot2->value->Show(); //设置显示数字
$ybplot3->value->Show(); //设置显示数字
$ybplot4->value->Show(); //设置显示数字
//$ybplot5->value->show();
//$ybplot6->value->show();
$graph->Add($barplot);  //将柱形图添加到图像中
$graph->title->Set("统计");
$graph->xaxis->title->Set("题目"); //设置标题和X-Y轴标题
$graph->yaxis->title->Set("人数(个人)");
$graph->title->SetColor("black");
$graph->title->SetMargin(10);
$graph->xaxis->title->SetMargin(3);
$graph->yaxis->title->SetMargin(-5);
$graph->xaxis->SetTickLabels($x);
$graph->title->SetFont(FF_SIMSUN,FS_BOLD);  //设置字体
$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();
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