php报表之jpgraph柱状图实例代码

新手初识jpgraph肯定会遇到各种各样的问题,比如乱码什么的,本案例是jpgraph3.0.7制作,也经过本人的多次实验，解决乱码问题 
复制代码 代码如下: 
$datay=array(); //纵坐标数据 
$datax=array(); //横坐标数据 
foreach ($usernums as $key => $value){ 
$datay[] = $value; 
$datax[] = $userids[$key]; 
} 
require_once (‘jpgraph-3.0.7/jpgraph/jpgraph.php'); 
require_once (‘jpgraph-3.0.7/jpgraph/jpgraph_bar.php'); 
// create the graph. these two calls are always required 
$graph = new graph(800,600); //图像高宽 
$graph->setscale(“textlin”); 
$graph->xaxis->setticklabels($datax); 
$graph->xaxis->setfont(ff_verdana,fs_normal,10); 
$graph->xaxis->setlabelangle(30); 
$graph->yaxis->scale->setgrace(20); 
$graph->xaxis->scale->setgrace(20); 
// add a drop shadow 
$graph->setshadow(); 
// adjust the margin a bit to make more room for titles 
$graph->img->setmargin(40,30,20,40); 
// create a bar pot 
$bplot = new barplot($datay); 
// adjust fill color 
$bplot->setfillcolor(‘orange'); 
$bplot->value->show(); 
$bplot->value->setfont(ff_arial,fs_bold,10); 
$bplot->value->setangle(45); 
$bplot->value->setformat(‘%d'); 
$graph->add($bplot); 
// setup the titles 
$graph->title->set(iconv(“utf-8″, “gb2312″,”用户消费报表图”)); 
$graph->xaxis->title->set(iconv(“utf-8″, “gb2312″,”用户姓名”)); 
$graph->yaxis->title->set(iconv(“utf-8″, “gb2312″,”用户订单数量”)); 
$graph->xaxis->title->setfont(ff_simsun,fs_bold); 
$graph->yaxis->title->setfont(ff_simsun,fs_bold); 
$graph->title->setfont(ff_simsun,fs_bold); 
// display the graph 
$graph->stroke(); 
?>