In what scenarios would it be advisable to switch from using Spreadsheet Excel Writer to PHPExcel, considering the limitations of the former mentioned in the thread?

If you are encountering limitations with Spreadsheet Excel Writer such as lack of support for newer Excel formats or limited functionality, it would be advisable to switch to PHPExcel. PHPExcel offers more features and support for a wider range of Excel formats, making it a more robust solution for handling Excel files in PHP applications.

// Example code snippet using PHPExcel to create a new Excel file and write data to it
require_once 'PHPExcel.php';

$objPHPExcel = new PHPExcel();

$objPHPExcel->setActiveSheetIndex(0)
            ->setCellValue('A1', 'Hello')
            ->setCellValue('B1', 'World');

$objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel2007');
$objWriter->save('hello_world.xlsx');