フォームの内容をExcelファイルとして保存するボタンの作り方

$filename = "members".date('Ymd');$member = $this->Members_model->member_for_export();header("Content-type: application/vnd.ms-excel; charset=utf-8");header("Content-Disposition: attachment; filename=$filename.xls");echo  iconv('UTF-8', 'GBK', '会员列表') . "\t\n";echo  iconv('UTF-8', 'GBK', '编号') ."\t";echo  iconv('UTF-8', 'GBK', '电子邮箱')."\t\n";foreach ($member AS $key => $value){	$order_by = $key +1;	echo iconv('UTF-8', 'GBK', $order_by). "\t";	echo iconv('UTF-8', 'GBK', $value['email']). "\t";	echo "\n";}exit;