php導出excel

function getexcel($list){		
	$html = "\xEF\xBB\xBF";
	$title = array('企業名稱','用戶名','手機號','註冊時間','最後登錄時間');  // execl 表格第一欄標題
	foreach($title as $k=>$v){
		$html .= $v."\t,";
	}
	$html .= "\n";
		
	foreach($list as $k=>$v){
		$html .= $v['firmName']."\t,";
		$html .= $v['username']."\t,";
		$html .= $v['mp']."\t,";
		$html .= date('Y-m-d H:i:s',$v['createtime'])."\t,";
		$html .= date('Y-m-d H:i:s',$v['lasttime'])."\t,";
		$html .= "\n";
	}

	header("Content-type:application/vnd.ms-excel;charset=UTF-8");
	header("Content-Disposition:attachment; filename=" . urlencode("用戶數據.csv"));
	echo $html;
		
}