Can't export any excel

Author: debin-geCreated Oct 19, 2018Updated Oct 19, 2018

I can't export any excel files, but it returns me a bunch of garbled.I just export an empty excel file.


        $PHPExcel = new \PHPExcel();
        $fileName='test';
        $PHPWriter = \PHPExcel_IOFactory::createWriter($PHPExcel,'Excel2007');
        header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
        header('Content-Type: application/cha');
        header("Content-Disposition: attachment;filename=$fileName".".xlsx");
        header('Cache-Control: max-age=0');
        $PHPWriter->save("php://output");

Source: PHPOffice/PHPExcel

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