What precautions should be taken when creating automated packaging scripts in PHP to ensure that the resulting archives are compatible with various operating systems, such as Mac OS X?

When creating automated packaging scripts in PHP, it is important to ensure that the resulting archives are compatible with various operating systems, such as Mac OS X. One way to achieve this is by setting the correct file permissions for the archived files. This can be done by explicitly setting the permissions using PHP's `chmod` function before creating the archive.

// Set the correct file permissions before creating the archive
chmod($file, 0644);

// Create the archive using PHP's ZipArchive class
$zip = new ZipArchive();
$zip->open('archive.zip', ZipArchive::CREATE | ZipArchive::OVERWRITE);

// Add files to the archive
$zip->addFile($file);

// Close the archive
$zip->close();