Symfony version(s) affected

5.4 >=

Description

The Finder component is not able to traverse folders when the supplied path is a stream (for instance ftp://localhost/ and the current environment is Windows.

Note that I have tested this on 5.4 as my Windows machine has PHP7.4, I have tests this and the the same bug appears for PHP8.2 and the current latest Finder version 7.2.

How to reproduce

Setup an ftp server, for instance garethflowers/docker-ftp-server with the servers root pointing at a directory with some of directories and files more than 1 level deep.

On Windows try the following code:

use Symfony\Component\Finder\Finder;

require __DIR__.'/vendor/autoload.php';

$finder = new Finder();
foreach ($finder->in("ftp://user:123@my-ftp-server/") as $file) {
   print_r($file);
}

Note that only the first level is displayed.

Then try:

use Symfony\Component\Finder\Finder;

require __DIR__.'/vendor/autoload.php';

$finder = new Finder();
foreach ($finder->in("ftp://user:123@my-ftp-server/") as $file) {
   dump($file->getMTime());
}

Note that PHP throws fatal error, although this is now fixed since 57895. Still though, only the first level is displayed.

Possible Solution

Possible allowing the RecursiveDirectoryIterator::UNIX_PATHS flag to be enabled, optionally, similar to RecursiveDirectoryIterator::FOLLOW_SYMLINKS in Finder::searchInDirectory when it is building its iterators.

$flags |= \RecursiveDirectoryIterator::UNIX_PATHS;

This seems to "fix" the problem for me and seems to work well on Linux and Windows. There maybe further unseen pitfalls though!

Additional Context

No response