<?php require __DIR__ . '/../Header.php'; $spreadsheet = require __DIR__ . '/../templates/sampleSpreadsheet.php'; // Set password against the spreadsheet file $spreadsheet->getSecurity()->setLockWindows(true); $spreadsheet->getSecurity()->setLockStructure(true); $spreadsheet->getSecurity()->setWorkbookPassword('secret'); // Save $helper->write($spreadsheet, __FILE__);