Create multiple worksheet by PhpSpreadsheet

create_worksheets.php

<?php
/*
Install: composer require phpoffice/phpspreadsheet:dev-develop

Github: https://github.com/PHPOffice/PhpSpreadsheet/
Document: https://phpspreadsheet.readthedocs.io/
*/

require 'vendor/autoload.php';
use PhpOffice\PhpSpreadsheet\IOFactory;
use PhpOffice\PhpSpreadsheet\Spreadsheet;

// Create new Spreadsheet object
$spreadsheet = new Spreadsheet();
// Set document properties
$spreadsheet->getProperties()->setCreator('PhpOffice')
        ->setLastModifiedBy('PhpOffice')
        ->setTitle('Office 2007 XLSX Test Document')
        ->setSubject('Office 2007 XLSX Test Document')
        ->setDescription('PhpOffice')
        ->setKeywords('PhpOffice')
        ->setCategory('PhpOffice');

// Add some data
$spreadsheet->setActiveSheetIndex(0)
        ->setCellValue('A1', 'Hello');
// Rename worksheet
$spreadsheet->getActiveSheet()->setTitle('URL Added');

$spreadsheet->createSheet();

// Add some data
$spreadsheet->setActiveSheetIndex(1)
        ->setCellValue('A1', 'world!');

// Rename worksheet
$spreadsheet->getActiveSheet()->setTitle('URL Removed');

// Set active sheet index to the first sheet, so Excel opens this as the first sheet
$spreadsheet->setActiveSheetIndex(0);
// Redirect output to a client’s web browser (Xlsx)
header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
header('Content-Disposition: attachment;filename="01simple.xlsx"');
header('Cache-Control: max-age=0');
// If you're serving to IE 9, then the following may be needed
header('Cache-Control: max-age=1');
// If you're serving to IE over SSL, then the following may be needed
header('Expires: Mon, 26 Jul 1997 05:00:00 GMT'); // Date in the past
header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT'); // always modified
header('Cache-Control: cache, must-revalidate'); // HTTP/1.1
header('Pragma: public'); // HTTP/1.0
$writer = IOFactory::createWriter($spreadsheet, 'Xlsx');
$writer->save('php://output');
exit;

@asha15 I think you need to read your file first and then use method above to update to update it, then save.