Bug #13590: unix timestamp arithmetic has anomally
| From: | spedding at met dot co dot nz | Date: | Sun, 07 Oct 2001 23:05:17 +0000 |
| Subject: | Bug #13590: unix timestamp arithmetic has anomally | ||
| Groups: | php.dev | ||
| Request: | Send a blank email to php-dev+get-67508@lists.php.net to get a copy of this message | ||
From: spedding@met.co.nz
Operating system: NT2000/(+Redhat)
PHP version: 4.0.4pl1
PHP Bug Type: Date/time related
Bug description: unix timestamp arithmetic has anomally
creating a unix timestamp for a date with zero hours / minutes, and then
adding time of day as seconds gives wrong result.
snippet from my code
________________________
echo ("\n<!-- before hms ".strftime ("%b %d %Y %H:%M:%S",
$dateAndTime)."-->\n");
$dateAndTime += 7200;
echo ("\n<!-- before DST ".strftime ("%b %d %Y %H:%M:%S",
$dateAndTime)."-->\n");
________________________
example outputs
timestamp before arithmetic
<!-- before hms Oct 07 2001 00:00:00-->
after adding 7199 (ie 01:59)
<!-- before DST Oct 07 2001 01:59:59-->
after adding 7200 (ie 02:00)
<!-- before DST Oct 07 2001 03:00:00-->
only seems to happen for this transition between 1:59 and 2:00 , after that
the 1 hour error is consistent.
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Edit bug report at: http://bugs.php.net/?id=13590&edit=1