The DateTime::add() function is an inbuilt function in PHP which is used to add an amount of time (days, months, years, hours, minutes and seconds) to the given DateTime object.
Syntax:
- Object oriented style:
DateTime DateTime::add( DateInterval $interval )
- Procedural style:
DateTime date_add( DateTime $object, DateInterval $interval )
Parameters: This function uses two parameters as mentioned above and described below:
- $object: It specifies the DateTime object returned by date_create() function. This function returns a new DateTime object.
- $interval: This parameter holds the DateInterval object.
Return Value: This function returns the new DateTime object after changing on success or False on failure.
Below programs illustrate the DateTime::add() function in PHP:
Program 1:
<?php   // Initialising a DateTime $datetime = new DateTime('2019-09-30');   // DateInterval object is taken as the // parameter of the add() function // Here 1 day is added $datetime->add(new DateInterval('P1D'));   // Getting the new date after addition echo $datetime->format('Y-m-d') . "\n"; ?> |
Output:
2019-10-01
Program 2:
<?php   // Initialising a DateTime $datetime = new DateTime('2019-09-30');   // DateInterval object is taken as the // parameter of the add() function // Here 5 hours, 3 Minutes and 10 seconds is added $datetime->add(new DateInterval('PT5H3M10S'));   // Getting the new date after addition echo $datetime->format('Y-m-d H:i:s') . "\n"; ?> |
Output:
2019-09-30 05:03:10
