ID: 35699
Updated by: [EMAIL PROTECTED]
-Summary: strtotime can't handle leap years before 1970
Reported By: iquito at gmx dot net
Status: Assigned
Bug Type: Date/time related
Operating System: Debian Sarge
PHP Version: 5.1.1
Assigned To: derick
New Comment:
strtotime is actually corrrect here, it's the date() function that is
broken:
<?php
date_default_timezone_set("UTC");
$utc_time1 = strtotime('1964-01-01 00:00:00 UTC');
$utc_time2 = strtotime('1963-12-31 00:00:00 UTC');
echo $utc_time1, ':', $utc_time2, " - ", $utc_time1 - $utc_time2,
"\n";
echo date(DATE_ISO8601, $utc_time1), "\n";
echo date(DATE_ISO8601, $utc_time2), "\n";
?>
-189388800:-189475200 - 86400
1964-01-02T00:00:00+0000
1963-12-31T00:00:00+0000
compare timestamp with date program:
[EMAIL PROTECTED]:~$ date +%s --date "1964-01-01 00:00:00 UTC"
-189388800
[EMAIL PROTECTED]:~$ date +%s --date "1963-12-31 00:00:00 UTC"
-189475200
Previous Comments:
------------------------------------------------------------------------
[2005-12-16 06:11:58] iquito at gmx dot net
Description:
------------
strtotime() doesn't seem to handle leap years before 1970 correctly,
all dates in a leap year are off by one day when converted by
strtotime().
Reproduce code:
---------------
/* shows 1964-06-07 instead of 1964-06-06 */
echo date('Y-m-d', strtotime('1964-06-06'));
/* shows the correct date, 1963-06-06, thus confirming that it has
something to do with leap years, non-leap-years aren't affected. */
echo date('Y-m-d', strtotime('1963-06-06'));
/* curiously, also dates in january and february of a leap year are
affected by this bug */
echo date('Y-m-d', strtotime('1964-01-06')); // returns 1964-01-07
Expected result:
----------------
echo date('Y-m-d', strtotime('1964-06-06')); // should return
1964-06-06 !
Actual result:
--------------
echo date('Y-m-d', strtotime('1964-06-06')); // returns 1964-06-07 !
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=35699&edit=1
