今日、昨日、上周、本月 起始时间戳和结束时间戳

//今日开始时间
        $beginToday = mktime(0, 0, 0, date("m"), date("d"), date("Y"));
        $endToday = mktime(0, 0, 0, date("m"), date("d") + 1, date("Y")) - 1;
        //昨日起始时间戳
        $beginYesterday = mktime(0, 0, 0, date("m"), date("d") - 1, date("Y"));
        $endYesterday = mktime(0, 0, 0, date("m"), date("d"), date("Y")) - 1;
        //上周
        $beginLastweek = mktime(0, 0, 0, date("m"), date("d") - date("w") + 1 - 7, date("Y"));
        $endLastweek = mktime(23, 59, 59, date("m"), date("d") - date("w") + 7 - 7, date("Y"));
        //本月
        $beginThismonth = mktime(0, 0, 0, date("m"), 1, date("Y"));
        $endThismonth = mktime(23, 59, 59, date("m"), date("t"), date("Y"));