下载PHPSpreedsheet excel文件以损坏的文件结尾

Question

我使用PhpSpreadsheet库创建一个xls并下载它，但文件已损坏。 xls将被写入输出流，而不会创建文件。

我试图创建一个空的电子表格，但失败了。您可以在以下代码示例中看到它：

$spreadsheet = new Spreadsheet();

$writer = new Xls($spreadsheet);
header('Content-Type:application/vnd.ms-excel');
header('Content-Disposition: attachment;filename="Auswertung_Allgemeinkosten.xls"');
header("Pragma: no-cache");
header("Expires: 0");
header('Cache-Control: max-age=0');
$writer->save('php://output'); 

如果我打开下载的文件，则会显示以下消息：

“'Auswertung_Allgemeinkosten.xls'的文件格式和扩展名不匹配。该文件可能已损坏或不安全。除非您信任它的来源，否则请不要打开它。是否要打开它？”

文件的外观如下：

Answer 1

为什么不使用空模板呢？

$path = "<PATH TO EXCEL>/empty.xlsx";
$targetPath= "<PATH TO TARGET>";

//generate Reader
$reader =  \PhpOffice\PhpSpreadsheet\IOFactory::createReader("Xlsx");

//Gen workbook
$spreadsheet = $reader->load($path);

//Do Your Stuff

$writer = \PhpOffice\PhpSpreadsheet\IOFactory::createWriter($spreadsheet, 'Xlsx');
$writer->save($targetPath);

Answer 2

这对我有帮助：

    $filename = 'Auswertung_Allgemeinkosten.xlsx';
    $writer->save($filename);


    header('Content-disposition: attachment; filename='.$filename);
    header('Content-type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
    header('Content-Length: ' . filesize($filename));
    header('Content-Transfer-Encoding: binary');
    header('Cache-Control: must-revalidate');
    header('Pragma: public');
    ob_clean();
    flush(); 

    readfile($filename);
    unlink($filename);