CODE EXAMPLE FOR PHP

phpspreadsheet password protected

// Set document security
$helper->log('Set document security');
$spreadsheet->getSecurity()->setLockWindows(true);
$spreadsheet->getSecurity()->setLockStructure(true);
$spreadsheet->getSecurity()->setWorkbookPassword('PhpSpreadsheet');

// Set sheet security
$helper->log('Set sheet security');
$spreadsheet->getActiveSheet()->getProtection()->setPassword('PhpSpreadsheet');
$spreadsheet->getActiveSheet()->getProtection()->setSheet(true); // This should be enabled in order to enable any of the following!
$spreadsheet->getActiveSheet()->getProtection()->setSort(true);
$spreadsheet->getActiveSheet()->getProtection()->setInsertRows(true);
$spreadsheet->getActiveSheet()->getProtection()->setFormatCells(true);