PHP date addition and subtraction calculation method sharing

This article mainly shares with you the date addition and subtraction calculation methods in PHP, hoping to help everyone.

PHP standard date format

date("Y-m-d H:i:s");

PHP simple date addition and subtraction calculation

<?php
    date_default_timezone_set(&#39;PRC&#39;); //默认时区
    echo "今天:",date("Y-m-d",time()),"\n";    echo "今天:",date("Y-m-d",strtotime("18 june 2008")),"\n";    echo "昨天:",date("Y-m-d",strtotime("-1 day")),"\n";    echo "明天:",date("Y-m-d",strtotime("+1 day")),"\n";    echo "一周后:",date("Y-m-d",strtotime("+1 week")),"\n";    echo "一周零两天四小时两秒后:",date("Y-m-d G:H:s",strtotime("+1 week 2 days 4 hours 2 seconds")), "\n";    echo "下个星期四:",date("Y-m-d",strtotime("next Thursday")),"\n";    echo "上个周一:".date("Y-m-d",strtotime("last Monday"))."\n";    echo "一个月前:".date("Y-m-d",strtotime("last month"))."\n";    echo "一个月后:".date("Y-m-d",strtotime("+1 month"))."\n";    echo "十年后:".date("Y-m-d",strtotime("+10 year"))."\n";
?>

Running result:

今天:2017-11-06今天:2008-06-18昨天:2017-11-05明天:2017-11-07一周后:2017-11-13一周零两天四小时两秒后:2017-11-15 22:22:42
下个星期四:2017-11-09上个周一:2017-10-30一个月前:2017-10-06一个月后:2017-12-06十年后:2027-11-06

PHP advanced date addition and subtraction calculation

<?php    // 默认时区
    date_default_timezone_set(&#39;PRC&#39;); 
     
    echo "今天: ", date(&#39;Y-m-d H:i:s&#39;), "\n";       // 输出当前时间
    echo "明天: ", date(&#39;Y-m-d H:i:s&#39;, strtotime(&#39;+1 day&#39;)), "\n";        // 输出明天时间
     
    //strtotime 可以接受第二个参数，类型timestamp为指定日期
    echo date(&#39;Y-m-d H:i:s&#39;, strtotime ("+1 day", strtotime(&#39;2017-11-11&#39;))), "\n";     
     
    // 这里+1 day 可以修改参数1为任何想需要的数  
    // day也可以改成year（年）month（月）hour（小时）minute（分）second（秒）
    echo date(&#39;Y-m-d H:i:s&#39;, strtotime("+1 day +1 hour +1 minute")), "\n";
?>

Run result:

今天: 2017-11-06 18:58:04明天: 2017-11-07 18:58:042017-11-12 00:00:002017-11-07 19:59:04

PHP Advanced Calculation Date Time Difference

<?php
    // 默认时区
    date_default_timezone_set(&#39;PRC&#39;); 
 
    echo date("Y-m-d H:i:s"), "\n"; 
    // 日期天数相加函数
    echo date(&#39;Y-m-d&#39;, strtotime(&#39;+1 day&#39;, strtotime(&#39;2016-09-12&#39;))), "\n\n"; 
    echo strtotime(&#39;2016-09-12&#39;), "\n";    echo date("Y-m-d", &#39;1473609600&#39;), "\n";    echo date("Y-m-d", &#39;1573609600&#39;), "\n"; 
    // 日期天数相加函数
    $d = "2016-09-12 10:12:20";    echo date("Y-m-d", strtotime("$d   +1   day")), "\n\n";   
 
    // 把日期转换成时间截
    function date2time($d){
        $year=((int)substr("$d",0,4));  //取得年份
        $month=((int)substr("$d",5,2)); //取得月份
        $day=((int)substr("$d",8,2));   //取得几号
        return mktime(0,0,0,$month,$day,$year);
    }    echo date2time("2016-09-12"), "\n\n";
 
    $date_1="2066-09-12";
    $date_2="2016-09-12";
    $Date_List_a1=explode("-",$date_1);
    $Date_List_a2=explode("-",$date_2);
    $d1=mktime(0,0,0,$Date_List_a1[1],$Date_List_a1[2],$Date_List_a1[0]);
    $d2=mktime(0,0,0,$Date_List_a2[1],$Date_List_a2[2],$Date_List_a2[0]);
    $Days=round(($d1-$d2)/3600/24);    echo "$date_2 -> $date_1 相差: $Days 天", "\n";?>

Run result:

2017-11-06 19:13:02
2016-09-13
 1473609600
2016-09-122019-11-132016-09-13
 1473609600
 
2066-09-12 -> 2016-09-12 相差: 18262 天

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