#34302 [Opn->Asn]: Date('W') do not return leading zeros for week 1 to 9 (as specified in ISO)

ID: 34302 Updated by: derick@php.net Reported By: sandved at gmail dot com -Status: Open +Status: Assigned Bug Type: Date/time related Operating System: all PHP Version: 5.0.4 -Assigned To: +Assigned To: derick Previous Comments: ------------------------------------------------------------------------ [2005-08-30 11:05:24] sandved at gmail dot com Description: ------------ The Date function have an ISO compilant Week parameter 'W' This parameter should return leading zeros for week 1 to 9 (always returning 2 digits). Why http://se.php.net/date : > W ISO-8601 week number of year, weeks starting on Monday > (added in PHP 4.1.0) This week parameter do not return leading zeros when used like Date('W'), Date('o\WW') etc. for the weeks 1 to 9 According to ISO 8601 weeks should be represented with leading zeros (from section 4.8 Leading zeros Each date and time component in a defined representation has a defined length, and leading zeros shall be used as required.) like: Date - Week (extended format) ---------- - ---------- 1997-12-29 - 1998-W01-1 1998-01-04 - 1998-W01-7 1998-01-01 - 1998-W01-4 1998-12-31 - 1998-W53-4 1992-01-01 - 1992-W01-3 1992-02-29 - 1992-W09-6 1992-12-31 - 1992-W53-4 1975-01-01 - 1975-W01-3 1975-12-28 - 1975-W52-7 1975-12-29 - 1976-W01-1 Sources Here's a copy of the latest free online copy http://www.pvv.org/~nsaa/8601v2000.pdf, only minor changes in the text in the latest version from ISO - also see http://en.wikipedia.org/wiki/ISO_8601. Reproduce code: --------------- ECHO date('W',strtotime('4 January 1999')); Expected result: ---------------- 01 Actual result: -------------- 1 ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=34302&edit=1