From: scottmacvicar at ntlworld dot com
Operating system: *
PHP version: 4CVS-2004-03-08 (stable)
PHP Bug Type: Date/time related
Bug description: gmmktime can return wrong value on the night that DST comes into
affect
Description:
------------
This bug seems to have different affect on Windows and Linux.
Windows
------
System has to be running GMT and Automatically adjust clock for daylight
savings time checked.
You'll notice that the 27th appears twice. The second occurence of the
27th is Sat Mar 27 23:00:00 2004.
------
Redhat 9.0
------
The timestamp for linux on the 28th is Sun Mar 28 02:00:00 2004
/etc/sysconfig/clock
ZONE="Europe/London"
UTC=true
ARC=false
------
So Windows lost an hour and linux gained 2 hours.
Patch
--- datetime.c 2004-03-09 02:19:32.000000000 +0000
+++ datetime.c.patched 2004-03-09 02:20:48.000000000 +0000
@@ -192,8 +192,8 @@
/* fall-through */
case 1: /* hour */
val = (*arguments[0])->value.lval;
- if (val < 1) {
- chgsecs += (1-val) * 60*60; val = 1;
+ if (val < 2) {
+ chgsecs += (2-val) * 60*60; val = 2;
}
ta->tm_hour = val;
/* fall-through */
Changing the time to
02:01:01 seems to correct this issue and the windows machine stops eating
an hour and not setting tm_idst to 1 and i have no idea whats going on
with the linux machine.
Reproduce code:
---------------
<?php
for ($i = 26; $i <= 29; $i++)
{
$datestamp = gmmktime(0, 0, 0, 3, $i, 2004);
$day = gmdate('j', $datestamp);
echo "$datestamp - $day\n\n";
}
?>
Expected result:
----------------
1080259200 - 26
1080345600 - 27
1080432000 - 28
1080518400 - 29
Actual result:
--------------
Windows
---
1080259200 - 26
1080345600 - 27
1080428400 - 27
1080518400 - 29
Linux
---
1080259200 - 26
1080345600 - 27
1080439200 - 28
1080518400 - 29
--
Edit bug report at http://bugs.php.net/?id=27533&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=27533&r=trysnapshot4
Try a CVS snapshot (php5): http://bugs.php.net/fix.php?id=27533&r=trysnapshot5
Fixed in CVS: http://bugs.php.net/fix.php?id=27533&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=27533&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=27533&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=27533&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=27533&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=27533&r=support
Expected behavior: http://bugs.php.net/fix.php?id=27533&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=27533&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=27533&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=27533&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=27533&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=27533&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=27533&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=27533&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=27533&r=float
