Description:
------------
I was creating a zip archive with php 7.4.6 (lib-zip version 1.6.1) without any problems.

Now I try to protect these zip archive with a password. Not just for encrypting with php, but in general. I found this tutorial (https://odan.github.io/2018/02/18/creating-encrypted-zip-files-with-password-in-php.html). It does what it should, but I could not read the files of the zip archive any more. If I doubleclick on the archive, the password prompt opens up, but it does not work with the password from the source code. I also copy and pasted it to prevent any keyboard struggle.

One problem is, that there is no password prompt, if all files are empty.

Same code works for files without line breaks (oneliner), but the error occurs, if the file has multiple lines.

Maybe I'm doing something wrong?

I also posted the question on https://stackoverflow.com/questions/61908181/could-not-open-password-protected-zip-archive maybe there are further information later.

Test script:
---------------
<?php

$zip = new ZipArchive();
$filePath = sprintf('%s/test/', __DIR__);
$fileName = 'test.zip';
$absoluteFilePath = sprintf('%s/%s', __DIR__, $fileName);
$excludeFolderNames = [
  '.',
  '..',
  $fileName,
];

$zipFlag = ZipArchive::CREATE;
if (file_exists($absoluteFilePath)) {
    $zipFlag = ZipArchive::OVERWRITE;
}

$createFile = $zip->open($absoluteFilePath, $zipFlag);
if (true !== $createFile) {
    throw new RuntimeException(sprintf('could not open file in "%s" with: %s', $fileName, $createFile));
}

$iterator = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($filePath));
$password = 'top-secret';
if (!$zip->setPassword($password)) {
    throw new RuntimeException('Set password failed');
}

/** @var SplFileInfo $value */
foreach ($iterator as $key => $value) {
    if (in_array($value->getFilename(), $excludeFolderNames)) {
        continue;
    }

    $cleanFilePath = realpath($key);
    if (!$cleanFilePath) {
        throw new RuntimeException(sprintf('could not create real path from filepath: %s', $key));
    }

    $zipName = str_replace($filePath, '', $cleanFilePath);
    if (!$zip->addFile($cleanFilePath, $zipName)) {
        throw new RuntimeException(sprintf('Add file failed: %s', $cleanFilePath));
    }

    if (!$zip->setEncryptionName($zipName, ZipArchive::EM_AES_256)) {
        throw new RuntimeException(sprintf('Set encryption failed: %s', $zipName));
    }
}

$zip->close();

Expected result:
----------------
A password protected zip archive, which can be unpacked in a operating system.

Actual result:
--------------
On every try to unpack the ziparchive the password prompt comes up again and again.