我正面临着 PHPExcel excel下载代码的问题.下载代码正在一台服务器上工作(netcore服务器),但是同样的代码集在AWS server上无法工作.任何人都可以帮我弄清楚究竟是什么问题？以下是PHPexcel下载代码：

error_reporting(E_ALL);
ini_set('display_errors',TRUE);
ini_set('display_startup_errors',TRUE);
date_default_timezone_set('EuroPE/London');

if (PHP_SAPI == 'cli')
    die('This example should only be run From a Web browser');

/** Include PHPExcel */
require_once '../Classes/PHPExcel.PHP';


// Create new PHPExcel object
$objPHPExcel = new PHPExcel();

// Set document PRoperties
$objPHPExcel->getProperties()->setCreator("Maarten Balliauw")
                             ->setLastModifiedBy("Maarten Balliauw")
                             ->setTITle("Office 2007 XLSX test Document")
                             ->setSubject("Office 2007 XLSX Test Document")
                             ->setDescription("Test document for Office 2007 XLSX,generated using PHP classes.")
                             ->setKeywords("office 2007 openXMl PHP")
                             ->setCategory("Test result file");


// Add some data
$objPHPExcel->setActiveSheetIndex(0)
            ->setCellValue('A1','Hello')
            ->setCellValue('B2','world!')
            ->setCellValue('C1','Hello')
            ->setCellValue('D2','world!');

// Miscellaneous glyphs,UTF-8
$objPHPExcel->setActiveSheetIndex(0)
            ->setCellValue('A4','Miscellaneous glyphs')
            ->setCellValue('A5','éàèùâêîôûëïüÿäöüç');

// rename worksheet
$objPHPExcel->getActiveSheet()->setTitle('Simple');


// Set active sheet index to the First sheet,so Excel opens this as the first sheet
$objPHPExcel->setActiveSheetIndex(0);


// redirect output to a client’s web browser (Excel5)
header('Content-type: application/vnd.ms-excel');
header('Content-Disposition: attachment;filename="01simple.xls"');
header('Cache-Control: max-age=0');
// If you're serving to IE 9,then the following may be needed
header('Cache-Control: max-age=1');

// If you're serving to IE over SSL,then the following may be needed
header ('Expires: Mon,26 Jul 1997 05:00:00 GMT'); // Date in the past
header ('Last-Modified: '.gmdate('D,d M Y H:i:s').' GMT'); // always modified
header ('Cache-Control: cache,must-revalidate'); // HTTP/1.1
header ('Pragma: public'); // HTTP/1.0

$objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel,'Excel5');
$objWriter->save('PHP://output');

下载Excel文件但使用垃圾/不支持的字符

PKU~AG�D�X�[Content_Types].xML��MN�0��"�%nY ��vAa �(0��ؖg�w{&i�@�nbE�{��y��d۸l m�����X�(���)���F��;@1_�����c)j�x/%��E��y� �QĿi!��K�

$objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel,'Excel5');
ob_end_clean();
$objWriter->save('PHP://output');