Error : the file format or file extension is not valid. verify that the file has not been corrupted

Question

我想在我的项目中使用 PHPSpreadsheet 库将数据导出到 excel 导出的文件，但是当我尝试打开文件时显示此错误：excel 无法打开文件，因为文件格式或文件扩展名无效。确认文件没有损坏

• 注意：我在我的项目中使用 MVC 所以控制器中的代码如下：

         protected function Excel($view, $variables = [])
  {
    require_once PATH_LIBRARY_FOLDER.'PhpSpreadsheet\vendor\autoload.php';
    ob_start();
    // Note: make new Spreadsheet object
    $spreadsheet = new Spreadsheet();
    // Note: get current active sheet (frist sheet)
    $sheet = $spreadsheet->getActiveSheet();
    $sheet->setCellValue('A1', 'Hello World !');
  
    extract($variables);
    include($this->viewPath.$view.'.php');
    // Note: set the header to define it is excel file
    header("Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
    // Note: set the header to define excel file name
    header("Content-Disposition: attachment;filename=\"filename.xlsx\"");
    header("Cache-Control: max-age=0");
  
    // Note: create IOFactory object
    $writer = IOFactory::createWriter($spreadsheet, 'xlsx');
    ob_get_clean();
  
    $writer->save('php:://output');
    exit();
  }
  

当我以文本形式打开文件时，我发现了这个错误：

Fatal error: Uncaught PhpOffice\PhpSpreadsheet\Writer\Exception: Could not open php:://output for writing. in C:\xampp\htdocs\GL_App\Library\PhpSpreadsheet\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Writer\Xlsx.php:218

Answer 1

更改这行代码

$writer->save('php:://output');

到

$writer->save('php://output');

应该可以。另外，如何将数据传递给excel sheet？您的数据可能已损坏。

请将此插入您的代码后 autoload.php

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

Answer 2

我有同样的问题，我的解决方案在这里。只需将代码放在下面：

ob_end_clean();

代码：

        ob_end_clean();
        header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
        header('Content-Disposition: attachment;filename="'. $filename );
        header('Cache-Control: max-age=0');

        $writer->save('php://output'); // download file