Published Jul 12, 2023
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The date_add() function takes an existing DateTime object and adds a specified number of days, months, years, hours, minutes or seconds.


date_add(date_object, time_frame_to_add)

The date_object parameter is an existing DateTime object.

The time_frame_to_add parameter is a DateInterval object.


The following example uses to create a new DateTime object.

The DateTime object is then used as the first parameter of date_add(). The second parameter is a DateInterval object, created by the built-in function date_interval_create_from_date_string(). This function accepts a string containing a numeric value followed by a unit of time.

Note: The unit of time can be written in singular or plural form.

The output is then printed to the console, using to format the string.

$my_date = date_create("2023-07-10 14:16:33");
date_add($my_date, date_interval_create_from_date_string("3 days"));
echo date_format($my_date,"Y-m-d G:i:s");

The code results in the following:

2023-07-13 14:16:33

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