$excel2 = PHPExcel_IOFactory::createReader('Excel2007');
$excel2 = $excel2->load('ExampleSpreadsheettest.xlsx');
$excel2->setActiveSheetIndex(0);
$excel2->getActiveSheet()->setCellValue('A4', 'first page')
->setCellValue('A1', '5')
->setCellValue('A2', '6')
->setCellValue('A3', '7');
$objWriter = PHPExcel_IOFactory::createWriter($excel2, 'Excel2007');
$objWriter->save('ExampleNew.xlsx');
Above code is working but i want to add more worksheets instead of single work sheet.
Reading the PHPExcel documentation might help: the addSheet() method is used to add a new worksheet.
$excel2->addSheet();
$excel2->setActiveSheetIndex(1);
$excel2->getActiveSheet()->setCellValue('A4', 'second page') ;