Bug #61642 [Opn->Csd]: modify("+5 weekdays") returns Sunday

Edit report at https://bugs.php.net/bug.php?id=61642&edit=1 ID: 61642 Updated by: stas@php.net Reported by: jeff at nd4c dot com Summary: modify("+5 weekdays") returns Sunday -Status: Open +Status: Closed Type: Bug Package: Date/time related Operating System: Fedora 14 and Windows 7 PHP Version: Irrelevant -Assigned To: +Assigned To: stas Block user comment: N Private report: N New Comment: This bug has been fixed in SVN. Snapshots of the sources are packaged every three hours; this change will be in the next snapshot. You can grab the snapshot at http://snaps.php.net/. For Windows: http://windows.php.net/snapshots/ Thank you for the report, and for helping us make PHP better. fixed in master Previous Comments: ------------------------------------------------------------------------ [2012-08-06 02:25:51] stas@php.net Automatic comment on behalf of johnnyspoon@gmail.com Revision: http://git.php.net/?p=php-src.git;a=commit;h=a6a7787cf25af0cf5b5672b677e20d9d40963137 Log: Fix #61642: modify(&quot;+5 weekdays&quot;) returns Sunday ------------------------------------------------------------------------ [2012-04-11 16:11:26] jeff at nd4c dot com The documentation is at: http://www.php.net/manual/en/datetime.formats.relative.php That page is linked to from: http://www.php.net/manual/en/datetime.formats.php Which is linked to from: http://www.php.net/manual/en/datetime.modify.php ------------------------------------------------------------------------ [2012-04-11 15:56:41] zhanglijiu at gmail dot com I check the php manual, there is no weekdays parameter for modify. So you have to use modify(+ n day) or modify(+ n week). ------------------------------------------------------------------------ [2012-04-05 18:01:12] jeff at nd4c dot com Description: ------------ Tested on Windows 7: Apache/2.2.16 (Win32) PHP/5.3.5 Tested on Fedora 14: Fedora release 14 (Laughlin) Linux 2.6.35.4-rscloud x86_64 php.x86_64 5.3.8-3.fc14 These are the latest stable versions I can find for these two systems. (Especially since V6 binaries are no longer available for Windows.) The Linux system is a live server using a framework that has not been tested with any later versions than 5.3.8 When modifying a DateTime instance with "+5 weekdays" it will return a date for a Sunday and not a weekday. Running the Test script you note that the section for "5" returns Sunday. All the other numbers are correct. Note the pattern for skipping the weekends is always for Friday, Saturday and Sunday. However for "+5" weekends should be skipped for Saturday, Sunday and Monday, which is different than for any other number. Test script: --------------- $days = array(1,2,3,4,5,6,7,8,); $dates = array('2012-03-29','2012-03-30','2012-03-31','2012-04-01','2012-04-02','2012-04-03','2012-04-04','2012-04-05',); foreach ($days as $businessdays) { foreach ($dates as $startdate) { $start = new DateTime($startdate); $date = new DateTime($startdate); echo '<br/>'.$businessdays.' : '.$date->format('l').' : '.$date->format('Y-m-d'); $date->modify("+{$businessdays} weekdays"); echo ' : '.$date->format('Y-m-d').' : '.$date->format('l'); } echo '<br/>'; } Expected result: ---------------- ... 5 : Thursday : 2012-03-29 : 2012-04-05 : Thursday 5 : Friday : 2012-03-30 : 2012-04-06 : Friday 5 : Saturday : 2012-03-31 : 2012-04-09 : Monday 5 : Sunday : 2012-04-01 : 2012-04-09 : Monday 5 : Monday : 2012-04-02 : 2012-04-09 : Monday 5 : Tuesday : 2012-04-03 : 2012-04-10 : Tuesday 5 : Wednesday : 2012-04-04 : 2012-04-11 : Wednesday 5 : Thursday : 2012-04-05 : 2012-04-12 : Thursday ... Actual result: -------------- ... 5 : Thursday : 2012-03-29 : 2012-04-05 : Thursday 5 : Friday : 2012-03-30 : 2012-04-08 : Sunday 5 : Saturday : 2012-03-31 : 2012-04-08 : Sunday 5 : Sunday : 2012-04-01 : 2012-04-08 : Sunday 5 : Monday : 2012-04-02 : 2012-04-09 : Monday 5 : Tuesday : 2012-04-03 : 2012-04-10 : Tuesday 5 : Wednesday : 2012-04-04 : 2012-04-11 : Wednesday 5 : Thursday : 2012-04-05 : 2012-04-12 : Thursday ... ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=61642&edit=1