//当天0点
$today=date("Ymd",$nowtime);
$today_start=strtotime($today);
//当天 23:59:59
$today_end=strtotime("{$today} + 1 day")-1;
//当月
$month_begindate=date('Y-m-01 H:m:s', strtotime(date("Y-m-d")));
//获取本周开始日期,如果$w是0,则表示周日,减去 6 天
$first=1;
//周一
$week=date('Y-m-d H:i:s',strtotime( date("Ymd")."-".($w ? $w - $first : 6).' days'));
$week_start=strtotime( date("Ymd")."-".($w ? $w - $first : 6).' days');
//本周结束日期
//周天
$week_end=strtotime("{$week} +1 week")-1;
$today=date("Ymd",$nowtime);
$today_start=strtotime($today);
//当天 23:59:59
$today_end=strtotime("{$today} + 1 day")-1;
//当月
$month_begindate=date('Y-m-01 H:m:s', strtotime(date("Y-m-d")));
$month_enddate =date('Y-m-d H:m:s', strtotime("$month_begindate +1 month -1 day"));
//转换为时间戳
strtotime($month_begindate);
//本周
$w=date('w',$nowtime);//获取本周开始日期,如果$w是0,则表示周日,减去 6 天
$first=1;
//周一
$week=date('Y-m-d H:i:s',strtotime( date("Ymd")."-".($w ? $w - $first : 6).' days'));
$week_start=strtotime( date("Ymd")."-".($w ? $w - $first : 6).' days');
//本周结束日期
//周天
$week_end=strtotime("{$week} +1 week")-1;