/**    * 导出数据为excel表格    *@param $data    一个二维数组,结构如同从数据库查出来的数组    *@param $title   excel的第一行标题,一个数组,如果为空则没有标题    *@param $filename 下载的文件名    *@examlpe     $stu = M (‘User‘);    $arr = $stu -> select();    exportexcel($arr,array(‘id‘,‘账户‘,‘密码‘,‘昵称‘),‘文件名!‘);*/private function exportexcel($data=array(),$title=array(),$filename=‘report‘){    header("Content-type:application/octet-stream");    header("Accept-Ranges:bytes");    header("Content-type:application/vnd.ms-excel");      header("Content-Disposition:attachment;filename=".$filename.".xls");    header("Pragma: no-cache");    header("Expires: 0");    //导出xls 开始    if (!empty($title)){        foreach ($title as $k => $v) {            $title[$k]=iconv("UTF-8", "GB2312",$v);        }        $title= implode("\t", $title);        echo "$title\n";    }    if (!empty($data)){        foreach($data as $key=>$val){            foreach ($val as $ck => $cv) {                $data[$key][$ck]=iconv("UTF-8", "GB2312", $cv);            }            $data[$key]=implode("\t", $data[$key]);                    }        echo implode("\n",$data);    }}