PHP code sharing for date addition and subtraction calculations

#

date_default_timezone_set('PRC'); //Default time zone

echo "Today:",date( "Y-m-d",time()),"\n";

echo "Today:",date( "Y-m-d",strtotime("18 june 2008")), "\n";

echo "Yesterday:",date( "Y-m-d",strtotime("-1 day")), "\n";

echo "Tomorrow:",date( "Y-m-d",strtotime("+1 day")), "\n";

echo "One week later:",date("Y-m-d",strtotime("+1 week")),"\n";

echo "One week, two days, four hours and two seconds later:",date("Y-m-d G:H:s",strtotime("+1 week 2 days 4 hours 2 seconds")), "\n";

echo "Next Thursday:",date("Y-m-d",strtotime("next Thursday")),"\n";

echo "Last Monday:".date("Y-m-d",strtotime("last Monday"))."\n";

echo "One month ago:".date("Y-m-d",strtotime("last month"))."\n";

echo "One month later:".date("Y-m-d",strtotime("+1 month"))."\n";

echo "Ten years later:".date("Y-m-d",strtotime("+10 year"))."\n";

?>

Today: 2017-11-06

Today: 2008-06-18

##Yesterday: 2017-11- 05

Ten years later: 2027-11-06

#

​ //Default time zone

​​ date_default_timezone_set('PRC');

    echo "Today: ", date( 'Y-m-d H:i:s'), "\n";        // Output the current time

    echo "Tomorrow: ", date( 'Y-m-d H:i:s', strtotime('+1 day')), "\n";           //Output tomorrow’s time

//strtotime can accept the second parameter, the type timestamp is the specified date

    echo date('Y-m-d H:i:s', strtotime ("+1 day", strtotime('2017-11-11'))), "\n";

// +1 day here can modify parameter 1 to whatever you want The number

// day can also be changed to year (year) month (month) hour (hour) minute (minute) second (second)

    echo date('Y-m-d H:i:s', strtotime("+1 day +1 hour +1 minute")), "\n";

?>

##

//Default time zone

date_default_timezone_set('PRC');

echo date("Y-m-d H:i:s"), "\ n";

// Date and day addition function

    echo date('Y-m-d', strtotime('+1 day', strtotime('2016-09-12'))), "\n\n";

    echo strtotime('2016-09-12'), "\n";

    echo date("Y-m-d", '1473609600'), "\n";

echo date("Y-m-d", ' 1573609600'), "\n";

​ // Date and day addition function

    $d = "2016-09-12 10:12:20";

echo date("Y-m-d", strtotime ("$d +1 day")), "\n\n";

//Convert date to time

                                                                                                                       #$year=((int)substr("$d"

,0, 4)); //Obtained year

       $month=((int)substr("$d",5,2)); //Get the month

        $day=( (int)substr("$d",8,2)); //Get the number Number

        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 difference: $Days days", "\n";

2017-11-06 19:13:02

##2016-09-13

1473609600

2016-09-12

2019-11-13

2016- 09-13

1473609600

2066-09-12 -> 2016- 09-12 Difference: 18262 days