Bug #63927 [Nab]: Bogus week number with date + strtotime

Edit report at https://bugs.php.net/bug.php?id=63927&edit=1 ID: 63927 User updated by: tcheko at no-log dot org Reported by: tcheko at no-log dot org Summary: Bogus week number with date + strtotime Status: Not a bug Type: Bug Package: Date/time related Operating System: Linux PHP Version: 5.4.10 Block user comment: N Private report: N New Comment: Replace Y with o for expected year. Definitly subtle, misleading and brain damaged. for($i = 15; $i >= 0; $i--) echo date("oW", strtotime("-$i week")) . "<br />"; Previous Comments: ------------------------------------------------------------------------ [2013-01-07 09:22:54] rasmus@php.net There is no bug here. This is correct as per the ISO-8601 Date spec. The first week of the year is the week that contains the first Thursday. And weeks always start on Mondays. That means the first day of the first week is not always in the same calendar year as the first Thursday. Please read the ISO-8601 spec for more details. ------------------------------------------------------------------------ [2013-01-07 09:06:49] tcheko at no-log dot org Description: ------------ the test script returns date formated as year+week. It should return a list of date like this: ... 201250 201251 201252 201301 201302 ... NB: increase $i if current weeknumber is greater than 14 to expose the bug. Test script: --------------- <?php for($i = 15; $i >= 0; $i--) echo date("YW", strtotime("-$i week")) . "<br />"; ?> Expected result: ---------------- ... 201250 201251 201252 201301 201302 ... Actual result: -------------- ... 201250 201251 201252 **201201** 201302 ... ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=63927&edit=1