/**

    * 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!');

*/

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);

    }

}