PHP 获取本周一和下周一的时间，获取一周的开始时间和结束时间

date('Y-m-d', (time() - ((date('w') == 0 ? 7 : date('w')) - 1) * 24 * 3600)); //获取本周一的时间

   date('Y-m-d',strtotime('+1 week last monday'));//获取下周一的时间  function get_week($time = '', $format='Y-m-d'){
         $time = $time != '' ? $time : time();
         //获取当前周几
         $week = date('w', $time);
         $weekname = array('周一','周二','周三','周四','周五','周六','周日');
         //星期日排到末位
         if(empty($week)){
             $week=7;
         }
         $date = [];
         for ($i=0; $i<7; $i++){
             $date_time = date($format ,strtotime( '+' . $i+1-$week .' days', $time));
             $date[$i]['date'] = $date_time;
             $date[$i]['time'] = strtotime($date_time);
             $date[$i]['week'] = $weekname[$i];
         }
         return $date;
     }

   print_r(get_week(strtotime('2019-12-02'),'Y-m-d'));