Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to report
a bug at http://bugs.php.net/how-to-report.php

First thanks for filing this because I found an error in the class layout. RecursiveFilterIterator::accept must be abstract. And instead you want to use ParentIterator (PI). Another issue is actually in your code. RecursiveIteratorIterator (RII) does not return parents until you specify so by changing its mode (for instance RII::SELF_FIRST). The next issue in the code is that PI::getChildren returns a RecursiveIterator (RI) since it calls RDI::geChildren. This is then passed to PI::__construct becuase it needs to keep the structure. Now in you rcode RFI::__construct you create another RDI. That is the ctor receives a PI that contains an RDI instance and creates a new RDI from it. While doing so the inner RDI is being rewound to its first element which is ".". Now as far as I can tell there will be a recursion somehow with this approach. For me it actually aborts with an exception message like, too many open files.

Given the fact that we don't fix recursions I'd say this is expected behavior. If you feel different reopen this report.

The correct code to get the directories is below:

<?php

class RDI extends RecursiveDirectoryIterator {}

class PI extends ParentIterator {}

class RII extends RecursiveIteratorIterator {}

$rii = new RII(new PI(new RDI($argv[1])), RII::SELF_FIRST);

foreach($rii as $f) {
	echo "$f\n";
}