#45414 [Opn->Bgs]: filemtime reports time shifted by daylight saving hours

ID: 45414 Updated by: jani@php.net Reported By: marcello at vezz dot it -Status: Open +Status: Bogus Bug Type: Filesystem function related Operating System: Windows XP PHP Version: 5.2.6 New Comment: Please do not submit the same bug more than once. An existing bug report already describes this very problem. Even if you feel that your issue is somewhat different, the resolution is likely to be the same. Thank you for your interest in PHP. Bug #40568 is not bogus or closed, it's suspended.. Previous Comments: ------------------------------------------------------------------------ [2008-07-02 09:58:49] marcello at vezz dot it Description: ------------ I quote from Bug #40568: PHP filemtime/fileatime/filectime (and maybe stat itself) functions should use GetFileTime() Win32API (or GetFileAttributesEx()), not stat() to retrieve the actual times from files. Otherwise the returned time is shifted by one hour in some conditions. This (mis)behaviour is actually DOCUMENTED by Microsoft, so it does not qualify for "bogus - fix microsoft libraries" bug rejection -- Microsoft already fixed their documentation and even indicated that "This behavior is by design." References: http://support.microsoft.com/kb/158588 http://support.microsoft.com/kb/190315 http://msdn2.microsoft.com/en-gb/library/ms724290.aspx http://us3.php.net/manual/en/function.stat.php#58404 http://www.codeproject.com/datetime/dstbugs.asp Reproduce code: --------------- <?php $fullfilename='test.dll'; $ft=filemtime($fullfilename); touch($fullfilename.'.md5',$ft); $nt=filemtime($fullfilename.'.md5'); echo $ft.' : '.$nt; ?> Please get test.dll from http://www.vezz.it/php/test.zip Original file modification date: 19 feb 2008, 19.08.47 Expected result: ---------------- filemtime should return the same result for the two files. 1203440927 : 1203440927 Actual result: -------------- 1203440927 : 1203437327 The touched file date is one hour back. 19 feb 2008, 18.08.47 instead of 19 feb 2008, 19.08.47 ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=45414&edit=1