How to get multiple times using PHP

1. Get the time of the first day and the last day of last month

The first day of last month:

echo date('Y-m-d', strtotime(date('Y-m-01') . ' -1 month'));// 计算出本月第一天再减一个月

The last day of last month:

echo date('Y-m-d', strtotime(date('Y-m-01') . ' -1 day'));// 计算出本月第一天再减一天

2. Get the first and last day of the month

 $BeginDate=date('Y-m-01', strtotime(date("Y-m-d")));
   echo $BeginDate;
   echo date('Y-m-d', strtotime("$BeginDate +1 month -1 day"));

3. Get the year, month, day and number of days of the day.

   echo " 本月共有:".date("t")."天";
   echo " 当前年份".date('Y');
   echo " 当前月份".date('m');
   echo " 当前几号".date('d');

4. Use functions and arrays to get the first and last day of the month, which is more practical:

 function getthemonth($date)
   {
   $firstday = date('Y-m-01', strtotime($date));
   $lastday = date('Y-m-d', strtotime("$firstday +1 month -1 day"));
   return array($firstday,$lastday);
   }
   $today = date("Y-m-d");
   $day=getthemonth($today);
   echo "当月的第一天: ".$day[0]." 当月的最后一天: ".$day[1];

5. Get the date of this month ：

function getMonth($date){
  $firstday = date("Y-m-01",strtotime($date));
  $lastday = date("Y-m-d",strtotime("$firstday +1 month -1 day"));
  return array($firstday,$lastday);
}

6. Get the date of the previous month:

function getlastMonthDays($date){
  $timestamp=strtotime($date);
  $firstday=date('Y-m-01',strtotime(date('Y',$timestamp).'-'.(date('m',$timestamp)-1).'-01'));
  $lastday=date('Y-m-d',strtotime("$firstday +1 month -1 day"));
  return array($firstday,$lastday);
}

To get the date of the previous month, you need to get a timestamp first, and then add -1 to the month. , the super smart date() will convert something like 2018-0-1 into 2017-12-01.

7. Get the date of the next month:

function getNextMonthDays($date){
  $timestamp=strtotime($date);
  $arr=getdate($timestamp);
  if($arr['mon'] == 12){
    $year=$arr['year'] +1;
    $month=$arr['mon'] -11;
    $firstday=$year.'-0'.$month.'-01';
    $lastday=date('Y-m-d',strtotime("$firstday +1 month -1 day"));
  }else{
    $firstday=date('Y-m-01',strtotime(date('Y',$timestamp).'-'.(date('m',$timestamp)+1).'-01'));
    $lastday=date('Y-m-d',strtotime("$firstday +1 month -1 day"));
  }
  return array($firstday,$lastday);
}

This article summarizes some time implementation methods. For your reference. If there are any errors, please point them out, I would be very grateful. Thanks!

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