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我想提供一个Excel文件供PhpSpreadsheet下载

这是我的代码：

    require 'vendor/autoload.php';

    use PhpOffice\PhpSpreadsheet\Spreadsheet;
    use PhpOffice\PhpSpreadsheet\Writer\Xlsx;

    $spreadsheet = new Spreadsheet();
    $sheet = $spreadsheet->getActiveSheet();
    $sheet->setCellValue('A1', 'Hello World !');

    $writer = new Xlsx($spreadsheet);
    $writer = \PhpOffice\PhpSpreadsheet\IOFactory::createWriter($spreadsheet, 'Xlsx');

    header('Content-Type: application/vnd.ms-excel');
    header('Content-Disposition: attachment; filename="hello_world.xlsx"');
    $writer->save("php://output");

我收到以下错误消息：

    PHP Warning:  ZipArchive::close(): Failure to create temporary file: No such file or directory in /Users/sg/GitWorkingCopies/xxx1/xxx2/library/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xlsx.php on line 374
    PHP Fatal error:  Uncaught exception 'PhpOffice\PhpSpreadsheet\Writer\Exception' with message 'Could not close zip file php://output.' in /Users/sg/GitWorkingCopies/xxx1/xxx2/library/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xlsx.php:375

该PHPSpreadsheet的dokumentation说：

\ PhpOffice \ PhpSpreadsheet \ Writer \ Xlsx在写入php：// output时使用临时存储。默认情况下，临时文件存储在脚本的工作目录中。如果没有访问权限，它将退回到操作系统的临时文件位置。 …