note 56160 added to function.date

The parameter 'd' returns 0 for sunday, 1 for monday up to 6 for saturday. According to ISO (ISO 8601 - http://www.iso.org/iso/en/prods-services/popstds/datesandtime.html) the week starts on monday and ends on sunday, numbered 1 to 7. $ISOday = date('w'); //make sunday the last day in week, not the first as returned by the parameter 'w' if ($ISOday == 0) {$ISOday = '7';} Adjusted the code subitted in the posting below. Adjusted the year test: <?php /* * Code to ekstract the ISO Week format YYYY-Www-D from a given date * Here YYYY is the ISO year, ww the ISO week, and D day of week where 1-Monday and 7-Sunday * For example will 1999-01-03 return 1998-W52-7 * See more about ISO 8601 and how to treat weeks at http://www.phys.uu.nl/~vgent/calendar/isocalendar.htm * and http://www.pvv.org/~nsaa/ISO8601.html * Code done by nsaa@pvv.org 2005-08-25 */ // test cases //if // $datetext = "28 December 2003"; //2003-W52-7 // $datetext = "29 December 2003"; //2004-W01-1 //elseif $datetext = "3 January 1999"; //1998-W53-7 //$datetext = "4 January 1999"; //1999-W01-1 //$datetext = "2 January 2000"; //1999-W52-7 //$datetext = "3 January 2000"; //2000-W01-1 // //Adds leading 0 to the week number $ISOweek = substr('0' . date('W',strtotime($datetext)) , -2); $ISOday = date('w',strtotime($datetext)); //make sunday the last day in week, not the first as returned by the parameter 'w' if ($ISOday == 0) {$ISOday = '7';} //Checks if the ISO Week 01 falls in desember the year before if (((int)date('d',strtotime($datetext))>=29) && ((int)date('m',strtotime($datetext))==12) && ((int)date('W',strtotime($datetext))==1)) { $ISOyear = date('Y',strtotime($datetext)) + 1; //Checks if the ISO Week 52 or 53 falls in january the year after } elseif (((int)date('d',strtotime($datetext))<=3) && ((int)date('m',strtotime($datetext))==1) && ((int)date('W',strtotime($datetext))>=52)) { $ISOyear = date('Y',strtotime($datetext)) - 1; } else { $ISOyear = date('Y',strtotime($datetext)); } //echo $datetext,"<BR>"; echo "Date : " . date('Y-m-d',strtotime($datetext)) ,"<BR>"; echo "Week : " . $ISOyear . "-" . $ISOweek ,"<BR>"; echo "Full week: " . $ISOyear . "-" . $ISOweek . "-" . $ISOday ,"<BR>"; ?> returns Date : 1999-01-03 Week : 1998-53 Full week: 1998-53-7 ---- Manual Page -- http://www.php.net/manual/en/function.date.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+56160 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+56160&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+56160&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+56160&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+56160&report=yes&reason=useless Delete: non-english -- http://master.php.net/manage/user-notes.php?action=delete+56160&report=yes&reason=non-english Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+56160&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+56160&report=yes Search -- http://master.php.net/manage/user-notes.php