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This is probably the same or related to http://bugs.php.net/bug.php?id=25450 and http://bugs.php.net/bug.php?id=18710 but since they are for Win 2k and/or closed, I thought the best bet was to open a new one.
When a path-like-string is passed to dirname, if, and only if, the last entity (file, dir) is on the root (ie: only one / in the string) then dirname returns a backslash instead of a forward slash.
There doesn't appear to be a config to tell PHP which part seperator to use, thus the dirname function is pointlessly broken unless you can guarentee it will never be given a root level entry.
This, also, breaks your example in the documentation for header() for Location: header types.
You might argue it's not a bug since Windows is meant to handle both types of path seperator, but a URI does not, and this is you main audience.
This issue has been around for way past way too long.
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still this problem with PHP 5.0.4 WinXP SP2
PHP Version 5.0.4
System Windows NT LOOM-M 5.1 build 2600
Build Date Mar 31 2005 02:44:34
Configure Command cscript /nologo configure.js "--enable-snapshot-build" "--with-gd=shared"
Server API Apache
Virtual Directory Support enabled
Configuration File (php.ini) Path C:\WINDOWS\php.ini
PHP API 20031224
PHP Extension 20041030
Zend Extension 220040412
Debug Build no
Thread Safety enabled
Apache for Windows 95/NT
Apache Version Apache/1.3.29 (Win32) PHP/5.0.4
Apache Release 10329100
Apache API Version 19990320
This problem still exists with version 5.2.3 (OS: Windows XP SP 2, German) like loom at nons dot de mentioned. The string dirname() return should always include the same directory separator character as the string provided. So if I use the following:
the function should return '/' because I used the slash as directory seperator character, too.