i need some help with phpspreadsheet, i'm trying to load an excel spreadsheet, add something to it and then save it as a pdf, the problem is that when i load a template , saving as pdf doesn't work
ps : when i create a new spreadsheet it works fine.
$reader = IOFactory::createReader('Xlsx');
$spreadsheet = $reader->load('docs/MODEL_FACTURE_DOM_CRE.xlsx');
$spreadsheet->setActiveSheetIndex(0)
->setCellValue('B13', 'test')
->setCellValue('F13', 'test');
$spreadsheet->setActiveSheetIndex(0);
$spreadsheet->getActiveSheet()->setShowGridLines(false);
$rendererName = Settings::PDF_RENDERER_MPDF;
Settings::setPdfRendererName($rendererName);
$writer = IOFactory::createWriter($spreadsheet, 'Pdf');
$filename = 'FACTURE.pdf';
$writer->save($filename);
Any suggestions ?