php获取指定日期，前一天、前一周、前一个月、前一年，后一天，后一周，前一个月，前一年...

dump( date( 'Y-m-d', strtotime('2018-10-1 +1 day') ) );

dump( date( 'Y-m-d', strtotime('2018-10-1 +1 week') ) );

dump( date( 'Y-m-d', strtotime('2018-10-1 +1 month') ) );

dump( date( 'Y-m-d', strtotime('2018-10-1 +1 year') ) );

dump( date( 'Y-m-d', strtotime('2018-10-1 -1 day') ) );

dump( date( 'Y-m-d', strtotime('2018-10-1 -1 week') ) );

dump( date( 'Y-m-d', strtotime('2018-10-1 -1 month') ) );

dump( date( 'Y-m-d', strtotime('2018-10-1 -1 year') ) );

同理，把2018-10-1换成变量，就可以做很多事了！

ps 由于每个月份的天数不一样 +/- 1 month 特殊日期会有误差

//获取上一个月日期方法

public function getBeforeMonthDate($currentDate)
{
 $currentMonthDay = date('t',strtotime($currentDate));
 $currentDay = date('d', strtotime($currentDate));
 $yearMonth = date('Y-m', strtotime($currentDate));
 $beforeMonth = date('Y-m-d', strtotime("$yearMonth -1 month"));
 $beforeMonthDay = date('t', strtotime($beforeMonth));
 if ($beforeMonthDay < $currentMonthDay && $beforeMonthDay < $currentDay) {
 $beforeDate = date("Y-m-d", strtotime("last day of -1 month", strtotime($currentDate)));
 } else {
 $beforeDate = date('Y-m-d', strtotime("$currentDate -1 month"));
 }
 return $beforeDate;
}

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作者：kloumb
来源：CSDN
原文：https://blog.csdn.net/kloumb/article/details/84000700

转载于:https://www.cnblogs.com/pcx105/p/10328965.html