How to subtract 4 months from today's date?
问题 I need to declare two dates in "Ymd" format: $toDate and $fromDate . $toDate represents today's date and $fromDate needs to be 4 months earlier than today. $toDate = Date('Ymd'); $fromDate = ? How do I create $fromDate ? 回答1: Use the magic of strtotime: $fromDate = date("Ymd", strtotime("-4 months")); 回答2: see the code below... $fourmonthsback = date("Ymd", mktime(0, 0, 0, date("m")-4, date("d"), date("Y"))); OR $fourmonthsback = mktime(0, 0, 0, date("m")-4, date("d"), date("Y")); 来源: https:/