PHP gets summary of various times (code)

The content of this article is a summary (code) of various times obtained by PHP. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

Get the system time

For example: the day before the system, the previous day, the current Monday time of the previous week, etc.

1. Get the current system time

echo "date('Y-m-d',time())";

2. Get the system time of the previous day

echo "date("Y-m-d",strtotime("-1 day"))";
需要前几天就减去(-) 需要几天后就加(+)

3. Get the Monday and Sunday dates of the previous week in the current system time

//上周周日的日期
$lastSunday = date('Y-m-d', strtotime('-1 sunday', time()));
//根据时间差 减去6天前，算出上周周一日期
$lastMonday = date('Y-m-d',strtotime('$lastSunday -6 day',$ss));

4. Get the day of the current week. Sunday is 0, Monday to Saturday is 1 - 6

    $today = date('Y-m-d',time());
    //获取当前周的第几天 周日是 0 周一到周六是 1 - 6  
    $w=date('w',strtotime($today));  
    $first=1;
    //获取本周开始日期，如果$w是0，则表示周日，减去 6 天     
    $weekStart=date('Y-m-d 00:00:00',strtotime("$today-".($w ? $w - $first : 6).' days'));            
    //本周结束日期  
    $weekEnd=date('Y-m-d 23:59:59',strtotime("$weekStart +6 days"));
    //前一周的起始时间
    $weekStart = date('Y-m-d 00:00:00',strtotime("$weekStart -7 days"));
    $weekEnd = date('Y-m-d 23:59:59',strtotime("$weekEnd -7 days")););

5. How many days were there in the previous month

$t = date('t',strtotime('-1 month'));

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