Date addition and subtraction operations in php, php addition and subtraction operations _ PHP Tutorial

Date addition and subtraction operations in php, and php addition and subtraction operations. For addition and subtraction of dates in php, php addition and subtraction requires: to get another date by adding or subtracting a few days from a date. 1. First, use strtotime () obtain the date's timestamp. php's date addition and subtraction operations, and php's addition and subtraction operations.

Requirement: get another date by adding or subtracting a few days from a date

1. obtain the date timestamp through strtotime ().

2. obtain the timestamp N days ago and use the "current timestamp-N days in seconds = N days ago timestamp"

3. use the date () function to convert the format of the timestamp obtained N days ago.

Example: obtain the date of the previous day from January 1 ,.

 // Convert a time point to a timestamp
$ Date = strtotime ('2017-5-1 ');
// Output the date before the day, minus the number of seconds of the day in the timestamp
Echo date ('Y-m-D', $ date-1*24*60*60 );
?>

Output: 2012-4-30

In addition, the time () function obtains the timestamp of the current date!

Latency requirement: increase or subtract a few days from a date to get another date 1. first, obtain the date timestamp through strtotime...