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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