Description:
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Running recursive mkdir fails when there is a ".." directory in the path, and a symbolic link is present:

mkdir('a/d/../e',0755,true);

The problem is that it is is expanding the path string in place instead of following the physical filesystem.  After it traverses into a/d, the ".." directory actually takes you somewhere else.  Not to "a".  In bash this is like `cd -P`.

It worked like this in previous versions (at least on PHP 5.3.3 and before).

Where previous versions of PHP have acted this way, I think it is best for backwards compatibility for this to work.


It looks like this was broken when the fix for bug #55124 was applied:

it made it use expand_filepath_with_mode() with the CWD_EXPAND.  Maybe it should have used CWD_REALPATH instead?  Just a guess...

Test script:
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<?php

mkdir('a/b/c',0755,true);
symlink('b/c','a/d');
chmod('a',0555);

mkdir('a/d/../e',0755,true);

Expected result:
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On PHP 5.3.3 it runs with no output

Actual result:
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PHP Warning:  mkdir(): Permission denied in /var/autofs/home/dave/test-recursive-mkdir.php on line 7