Как поместить текст в два столбца, например (A1: B1, «hello world»)?
use PhpOffice\PhpSpreadsheet\Spreadsheet;
use PhpOffice\PhpSpreadsheet\Writer\Xlsx;
$spreadsheet = new Spreadsheet();
$sheet = $spreadsheet->getActiveSheet();
$sheet->setCellValue('A1', 'Hello World !');
$sheet->setCellValue('A2', 'Hola a todos !');
$sheet->setCellValueByColumnAndRow(5, 7, 'Prueba');
$writer = new Xlsx($spreadsheet);
$writer->save('excel/hello world.xlsx');