ID: 40271 Updated by: [EMAIL PROTECTED] Reported By: slomo at sonarkollektiv dot de Status: Feedback Bug Type: Date/time related Operating System: Mac OS X 10.4.8 PHP Version: 5.2.0 New Comment:
And please do not forget about expected and actual results. Thank you. Previous Comments: ------------------------------------------------------------------------ [2007-01-29 11:32:05] [EMAIL PROTECTED] Thank you for this bug report. To properly diagnose the problem, we need a short but complete example script to be able to reproduce this bug ourselves. A proper reproducing script starts with <?php and ends with ?>, is max. 10-20 lines long and does not require any external resources such as databases, etc. If the script requires a database to demonstrate the issue, please make sure it creates all necessary tables, stored procedures etc. Please avoid embedding huge scripts into the report. ------------------------------------------------------------------------ [2007-01-29 11:20:44] slomo at sonarkollektiv dot de Description: ------------ I was looking for a neat solution for the task "get the date for a given weeknumber and weekyear". I thought I got it, but there is a strange behaviour if (and only if) week no. is 1 and 4th of January is already a monday. See my code to reproduce the results, it's quite confusing. The idea was: - 4th of January is always in week no. 1 - add the missing weeks - make it a monday of that week acording to the GNU Date Input Formats syntax descibed at http://www.gnu.org/software/tar/ manual/html_node/tar_114.html#SEC114 So either me or PHP still does not get it right. Reproduce code: --------------- function MondayOfWeek($year, $week) { return strtotime("$year-01-04 UTC + " . ($week-1) . ' week last monday'); } for ($y = 1998; $y < 2012; $y++) { for ($w = 1; $w < 53; $w++) { $start = MondayOfWeek($y, $w); $end = strtotime("+6 day", $start); echo "KW $w/$y: " . gmstrftime('%A, %x %X', $start) . ' - ' . gmstrftime('%A, %x %X', $end) . " "; echo '- reverse check (week/year): ' . gmstrftime('%V/%G', $start) . "\n"; if ($w != gmstrftime('%V', $start) || $y != gmstrftime('%G', $start)) { echo "ERROR!\n"; } } echo "<hr>\n"; } Expected result: ---------------- accurate results for every week number and year with always the same behaviour ... Actual result: -------------- if week no. is 1 and 4th of January is already a monday, the function returns timestamps for the "previous week". ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=40271&edit=1