php如何实现将一个页面以excel格式保存，需要的时候能在转化成页面形式显示?

仅供参考

<?php 
header("Content-Type:text/html;charset=utf-8"); 
require_once 'excel_reader2.php'; 
set_time_limit(20000); 
ini_set("memory_limit","2000M"); 
//使用pdo连接数据库 
$dsn = "mysql:host=localhost;dbname=alumni;"; 
$user = "root"; 
$password = ""; 
try{ 
$dbh = new PDO($dsn,$user,$password); 
$dbh->query('set names utf8;'); 
}catch(PDOException $e){ 
echo "连接失败".$e->getMessage(); 
} 
//pdo绑定参数操作 
$stmt = $dbh->prepare("insert into alumni(gid,student_no,name) values (:gid,:student_no,:name) "); 
$stmt->bindParam(":gid", $gid,PDO::PARAM_STR); 
$stmt->bindParam(":student_no", $student_no,PDO::PARAM_STR); 
$stmt->bindParam(":name", $name,PDO::PARAM_STR); 
//使用php-excel-reader读取excel内容 
$data = new Spreadsheet_Excel_Reader(); 
$data->setOutputEncoding('UTF-8'); 
$data->read("stu.xls"); 
for ($i = 1; $i <= $data->sheets[0]['numRows']; $i++) { 
for ($j = 1; $j <= 3; $j++) { 
$student_no = $data->sheets[0]['cells'][$i][1]; 
$name = $data->sheets[0]['cells'][$i][2]; 
$gid = $data->sheets[0]['cells'][$i][3]; 
} 
//将获取的excel内容插入到数据库 
$stmt->execute(); 
} 
echo "执行成功"; 
echo "最后插入的ID：".$dbh->lastInsertId(); 
?>