ID: 27780
User updated by: Hua dot Qu at volvo dot com
Reported By: Hua dot Qu at volvo dot com
Status: Bogus
Bug Type: Date/time related
Operating System: Windows 2000
PHP Version: 4.3.4
New Comment:
Thank you for quickly reply.
I still consider it as a bug. If I set
$to = “2004-03-28 00:00:00”
$march0 = strftime("%Y-%m-%d %H:%M:%S", strtotime("$to"));
$march1 = strftime("%Y-%m-%d %H:%M:%S", strtotime("$to +1 second"));
$march2 = strftime("%Y-%m-%d %H:%M:%S", strtotime("$to +1 day "));
$march1 gives the correct result, while $march2 gives the wrong result.
Because during the midnight of 28th it changed from the wintertime to
the summertime for daylight saving.
As you pointed out, to add a timezone:
$to = "2004-03-28 00:00:00 WET";
$march0 = strftime("%Y-%m-%d %H:%M:%S", strtotime("$to"));
$march1 = strftime("%Y-%m-%d %H:%M:%S", strtotime("$to +1 seconds "));
$march2 = strftime("%Y-%m-%d %H:%M:%S", strtotime("$to +1 day "));
Relative to $march0, $march1 gives the correct output, but these two
outputs are not what I expected. $march2 is still totally wrong no
matter reference to which dates.
The point is, I think, PHP checks the output result with for daylight
saving, but not the original input date.
Regards,
Hua Qu
Previous Comments:
------------------------------------------------------------------------
[2004-03-30 12:12:55] [EMAIL PROTECTED]
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to report
a bug at http://bugs.php.net/how-to-report.php
You need to add timezone information to the original date.
For example change your text time to "2004-06-01 00:00:00
EST".
The end result will be that strtotime($to) will be 1
smaller then strtotime("$to +1 seconds "), which is the
correct output.
------------------------------------------------------------------------
[2004-03-30 10:52:02] Hua dot Qu at volvo dot com
Description:
------------
strtotime($tm + 1 xxx) always adds one more hour to the result, if the
result-time is in the summertime, no matter $tm is in the summertime or
not.
It is the same in PHP CVS (5.0.x-dev) Built On: Mar 30, 2004 14:30 GMT
I think it is the daylight-savings-time problem. Perhaps, $tm is not
checked if it is already in the daylight-savings-time.
There are already some similar reports, but they did not get the point,
and the bug has not been corrected untill Mar 30, 2004 14:30 GMT.
Reproduce code:
---------------
echo "I have get one hour too much!<br><br>";
$to = "2004-06-01 00:00:00";
echo strtotime($to)."<br>\n";
echo strtotime("$to +1 seconds ")."<br><br>\n";
$newtime1 = strftime("%Y-%m-%d %H:%M:%S", strtotime("$to +1 seconds
"));
$newtime2 = strftime("%Y-%m-%d %H:%M:%S", strtotime("$to +1 day "));
echo "$to <br>\n";
echo "+1 s= $newtime1<br>\n";
echo "+1day=$newtime2<br><br>\n";
$correct = strftime("%Y-%m-%d %H:%M:%S", strtotime("$to +1 second -1
hour"));
echo "correct: +1 s=$correct<br>";
Expected result:
----------------
If $tm is the summertime, strtotime($tm +1 day) should return 24 hours
more, not 25 hours more.
If $tm is the wintertime and result is in the summertime, it should
return one extra hour.
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/?id=27780&edit=1
