함수 week diff

1 PHP

function week_diff($w1, $w2) {
	$temp = new DateTime("$w1-1");
	$d = $temp->diff( new DateTime("$w2-1") );
	$sign = ($d->invert==0)?1:-1;
	return $d->days/7*$sign;
}
echo week_diff('2015-W01', '2015-W01'); // 0
echo week_diff('2015-W01', '2015-W02'); // 1
echo week_diff('2015-W02', '2015-W01'); // -1
echo week_diff('2015-W50', '2016-W02'); // 5
echo week_diff('2016-W02', '2015-W50'); // -5

2 같이 보기

• 함수 month_diff
• 함수 date_diff
• 함수 time_diff