PHP | date_sub() Function

Hello folks! welcome back to a new edition of our tutorial on PHP. In this tutorial guide, we are going to be studying about the PHP date_sub() Function.

The built-in PHP date_sub() function is an alias of DateTime::sub(). This PHP function accepts DateTime and DateInterval object as parameters, and subtracts the specified intetval to the given DateTime.

Syntax

Following below is the syntax to use this function -

date_sub($object, $interval)

READ: PHP | date() Function

Parameter Details

Sr.No	Parameter & Description
1	object(Mandatory) This is a DateTime object specifying/representing the date from which you need to subtract the time interval.
2	interval (Mandatory) This is a DateInterval object specifying the interval to be subtracted.

Return Value

This function returns a DateTime object with subtracted interval. In case of failure it returns false.

PHP Version

This function was first introduced as part of core PHP version 5.3.0 and, it works with all of the later versions.

Example1

Following example illustrates the usage of date_sub() function -

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

Output

When the above code is executed, it will produce the following result -

24-09-2019 13:59:30

Example2

The following example creates an interval using this function and, subtracts it from a date -

<?php
   $date = date_create("25-09-1989");
   $interval = date_interval_create_from_date_string('1025 days');
   $res = date_sub($date, $interval);   
   $format = date_format( $res, "d-m-Y");
   print($format);   
?>

Output

When the above code is executed, it will produce the following result -

05-12-1986

Example3

Now let us try to add interval with years, months, and days -

<?php
   //Creating a DateTime object
   $date = date_create("25-09-1989");
   //Adding interval to the date
   $res = date_sub($date, new DateInterval('P29Y2M5D'));   
   //formatting the date to print it
   $format = date_format( $res, "d-m-Y");
   print($format);
?>

Output

When the above code is executed, it will produce the following result -

20-07-1960

Example4

Try the following example -

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

Output

When the above code is executed, it will produce the following result -

08-12-1994

READ: PHP | time() Function

Alright guys! This is where we are going to be rounding up for this tutorial post. In our next tutorial, we are going to be discussing about the date_timestamp_get() Function in PHP.

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Thanks for reading and bye for now.