php displays various time periods



First set the time to Beijing time

date_default_timezone_set('PRC');

Current time
$curtime=date("Y-m-d H:i:s", time());

Due to Monday The division is different from what we usually understand, so we need to judge it separately.

if(date('D') == 'Mon'){

Last week:

            $last_week_start=date("Y-m-d H:i:s",strtotime("last Monday"));
                     =date("Y-m-d H:i:s",strtotime("this Monday"));

This week:
          $this_week_start=date("Y-m-d H:i:s",strtotime("this Monday"));
            $this_week_end=date("Y-m-d H:i:s",strtotime("next Monday"));

}else{

Previous week:
          $last_week_start=date("Y-m-d H:i:s" ,strtotime("last Monday -1 week"));
$last_week_end=date("Y-m-d H:i:s",strtotime("this Monday -1 week"));

This week:
$this_week_start=date ("Y-m-d H:i:s",strtotime("this Monday -1 week"));
                $this_week_end=date("Y-m-d H:i:s",strtotime("next Monday"));
}

Last month:
$last_m Month"))."-01 00:00:00";
$last_m Month"))."-01 00:00:00";
This month:
$this_m Month") )."-01 00:00:00";
$this_m Month"))."-01 00:00:00";
Today:
$this_day_start=date("Y-m-d", time())." 00 :00:00";
$this_day_end=date("Y-m-d",strtotime("+1 day"))." 00:00:00";