Excel 006 Security

<?php
use PhpOffice\PhpSpreadsheet\Spreadsheet;
use PhpOffice\PhpSpreadsheet\IOFactory;
/*
Bagian ini silahkan anggap tidak ada..
karena dasarnya ini include composer (autoload.php)
*/
{
    $paths = [
        __DIR__ . '/../vendor/autoload.php', // In case PhpSpreadsheet is cloned directly
        __DIR__ . '/../../../autoload.php', // In case PhpSpreadsheet is a composer dependency.
        __DIR__ . '/../../../web/example/vendor/autoload.php' //memakai ini
    ];

    foreach ($paths as $path) {
        if (file_exists($path)) {
            require_once $path;
            //echo "run:$path";
            ;
        }
    }



}


function sCellPos($row,$col)
{
    //hanya untuk A-Z (26)
    //$p=ord('A');//65
    $rowInt=64+$row;
    $p=chr($rowInt).$col;
    return $p;
}

//echo sCellPos(1,2);echo sCellPos(2,2);echo sCellPos(4,2);
//die();
?>
<!--
/**
##INFO##
{"title":"excel Dasar ","detail":"Membuat excel menggunakan PHP Spreadsheet . Memanfaatkan Lock, kunci untuk buka dan posisi ditentukan dengan fungsi bukan huruf.<br>terbatas hanya A-Z"}
##INFO##
**/
-->
<?php
$spreadsheet = new Spreadsheet();

$spreadsheet->setActiveSheetIndex(0)
    ->setCellValue(sCellPos(1,2), 'Hello')
    ->setCellValue(sCellPos(2,2), 'world!')
    ->setCellValue(sCellPos(3,1), 'Hello')
    ->setCellValue(sCellPos(4,2), 'world!')
    ->setCellValue(sCellPos(5,5), date("Y-m-d H:i:s"));

$spreadsheet->getActiveSheet()
    ->setTitle('Simple');

//not working???
$spreadsheet->getSecurity()->setLockWindows(false);
$spreadsheet->getSecurity()->setLockStructure(true);
$spreadsheet->getSecurity()->setWorkbookPassword('php2021');

$spreadsheet->getActiveSheet()->getProtection()->setPassword('php2021');
$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);




//properties
$spreadsheet->getProperties()->setCreator('Gunawan Wibisono')
    ->setLastModifiedBy('Scripter PHP')
    ->setTitle('Learn Document part 2')
    ->setSubject('Office 2007 XLSX Learn Document')
    ->setDescription('membuat dokumen Office 2007 XLSX, memanfaatkan Lock.')
    ->setKeywords('office 2007 openxml php')
    ->setCategory('php excel native');

/*
Pada Bagian ini disarankan simpan ke folder dahulu
sebelum mengeluarkan..
atau di download
*/
$file='contoh006.xlsx';

header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
header('Content-Disposition: attachment;filename="'.$file.'"');
header('Content-Length: ' . filesize($file));

header('Content-Transfer-Encoding: binary');
header('Cache-Control: must-revalidate');
header('Pragma: public');

ob_clean();
flush();

$writer = IOFactory::createWriter($spreadsheet, 'Xlsx');
$writer->save($file);

$str=file_get_contents($file);

die($str);