Usage and Examples of PHP date_sub() Function

PHP Date & Time Function Manual

The date_sub() function subtracts a certain amount of days, months, years, hours, minutes, and seconds from a DateTime object.

Definition and usage

This function isDateTime::sub()alias. This function accepts a DateTime object and a DateInterval object, subtracts the specified time interval from the given DateTime.

Syntax

date_sub$object,　$interval)

Parameter

Return value

The PHP date_sub() function returns a DateTime object from which the given interval is subtracted. If it fails, this function will return a boolean valuefalse.

PHP version

The date_sub() function was originally introduced in PHP version5.3introduced in PHP version 5.2.0 and can be used in all higher versions.

Online example

The following example demonstratesdate_sub()Usage of the function.-

<?php
　　　//Create a DateTime object
　　　$date　=　date_create("2019-09-25");
　　　//Add a time interval to the date
　　　$res　=　date_sub($date,　new　DateInterval('PT10H30S'));　　　
　　　//Format the date to print
　　　$format　=　date_format(　$res,　"Y-m-d　H:i:s");
　　　print($format);
?>

Output result

2019-09-24　13:59:30

Online example

The following example uses this function to create an interval and subtract the created interval from the date

<?php
　　　$date　=　date_create("1989-09-26");
　　　$interval　=　date_interval_create_from_date_string('1025　days');
　　　$res　=　date_sub($date,　$interval);　　　
　　　$format　=　date_format(　$res,　"Y-m-d");
　　　print($format);　　　
?>

Output result

1986-12-06

Online example

Now, let's try to add an interval with year, month, and day-

<?php
　　　//Create a DateTime object
　　　$date　=　date_create("1989-09-26");
　　　//Add an interval to the date
　　　$res　=　date_sub($date,　new　DateInterval('P29Y2M5D'));　　　
　　　//Format the date to print
　　　$format　=　date_format(　$res,　"Y-m-d");
　　　print($format);
?>

Output result

1960-07-21

Online example

<?php
　　　$date　=　date_create('1995-05-07')
　　　$interval　=　date_interval_create_from_date_string('150　days');
　　　$date->sub($interval);
　　　>print($date　->　format('Y-m-d'));
?>

This produces the following result-

1994-12-08