php案例：导出excel并且浏览器下载excel

<?php
require  "D:/phpstudy_pro/WWW/PHPExcel/PHPExcel.php";//引入PHPExcel对象
$localFileName = 'downloaded_excel.xlsx';
$objPHPExcel=new PHPExcel();//创建对象
$objSheet=$objPHPExcel->getActiveSheet();//拿到对象的操作方法来做事
$objSheet->setTitle("demo");//excel标题
$objSheet->setCellValue("A1","姓名")->setCellValue("B1","分数");
//A1 写姓名  B2写分数,看下面的图片哈
$objSheet->setCellValue("A2","张三")->setCellValue("B2","50");
/*$array=array(
    array("姓名","分数"),
    array("李四","60"),
    array("王五","70")
);*/
//或者生成数组也行
$objWriter=PHPExcel_IOFactory::createWriter($objPHPExcel,"Excel2007");
//生成excel2007版本号
$objWriter->save("D:/demo.slsx");
$objWriter->save($localFileName);
// 下载Excel文件
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="' . $localFileName . '"');
header('Content-Length: ' . filesize($localFileName));
readfile($localFileName);