함수 monweek2week()

1 개요

monweek to week

• YYYY-Www → YYYY-MM-Ww
• ISO-8601
• test set

2012-01-W1 → 2012-W01

2012-03-W3 → 2012-W11

2012-12-W4 → 2012-W52

2 Excel

2.1 1 cell

=TEXT(DATE(LEFT(A1,4),MID(A1,6,2),4)+7*(RIGHT(A1,1)-1),"YYYY")&"-W"&TEXT(INT((DATE(LEFT(A1,4),MID(A1,6,2),4)+7*(RIGHT(A1,1)-1)-DATE(YEAR(DATE(LEFT(A1,4),MID(A1,6,2),4)+7*(RIGHT(A1,1)-1)-WEEKDAY(DATE(LEFT(A1,4),MID(A1,6,2),4)+7*(RIGHT(A1,1)-1)-1)+4),1,3)+WEEKDAY(DATE(YEAR(DATE(LEFT(A1,4),MID(A1,6,2),4)+7*(RIGHT(A1,1)-1)-WEEKDAY(DATE(LEFT(A1,4),MID(A1,6,2),4)+7*(RIGHT(A1,1)-1)-1)+4),1,3))+5)/7),"00")

2.2 2 cells

• B1

=DATE(LEFT(A1,4),MID(A1,6,2),4)+7*(RIGHT(A1,1)-1)

• C1

=TEXT(B1,"YYYY")&"-W"&TEXT(INT((B1-DATE(YEAR(B1-WEEKDAY(B1-1)+4),1,3)+WEEKDAY(DATE(YEAR(B1-WEEKDAY(B1-1)+4),1,3))+5)/7),"00")

3 PHP

function monweek2week($monweek) {
	$weeknum = str_pad(date('W', strtotime(substr($monweek,0,7).'-4'))+substr($monweek,-1)-1, 2, '0', STR_PAD_LEFT);
	return substr($monweek,0,4)."-W$weeknum";
}

$monweek = '2012-12-W4';
$week = monweek2week($monweek);
echo $week; // 2012-W52

4 같이 보기

• 함수 week2monweek