php 封装一个时间类

class Times{

    //今日

    public static function today(){

        $start_date= date("Y-m-d 00:00:00");

        $end_date= date('Y-m-d 23:59:59');

        return ['s'=>$start_date,'e'=>$end_date];

    }

    //昨日

    public static function yesterday(){

        $time= date("Y-m-d",strtotime("-1 day"));

        $start_date= $time.' 00:00:00';

        $end_date= $time.' 23:59:59';

        return ['s'=>$start_date,'e'=>$end_date];

    }

    //明日

    public static function tomorrow(){

        $time= date("Y-m-d",strtotime("+1 day"));

        $start_date= $time.' 00:00:00';

        $end_date= $time.' 23:59:59';

        return ['s'=>$start_date,'e'=>$end_date];

    }

    //本周

    public static function thisWeek(){

        $start_date= date('Y-m-d', (time()- ((date('w')== 0 ? 7 : date('w'))- 1)* 24 * 3600)).' 00:00:00';

        $end_date=  date('Y-m-d', (time()+ (7 - (date('w')== 0 ? 7 : date('w')))* 24 * 3600)).' 23:59:59';

        return ['s'=>$start_date,'e'=>$end_date];

    }

    //上周

    public static function lastWeek(){

        $start_date= date('Y-m-d', strtotime('-1 monday',strtotime('-1 sunday')));

        $end_date= date('Y-m-d', strtotime('-1 sunday'));

        return ['s'=>$start_date,'e'=>$end_date];

    }

    //本月

    public static function tmonth(){

        $start_date= date('Y-m-1').' 00:00:00';

        $next= date("Y-m",strtotime("+1 month"));

        $end_date= date("Y-m-d",strtotime("$next -1 day")). ' 23:59:59';

        return ['s'=>$start_date,'e'=>$end_date];

    }

    //上月

    public static function lastMonth(){

        $start_date= date('Y-m-d', strtotime('-1 month', strtotime(date('Y-m', time()). '-01 00:00:00')));

        $end_date= date('Y-m-d', strtotime(date('Y-m', time()). '-01 00:00:00')- 86400);

        return ['s'=>$start_date,'e'=>$end_date];

    }

}