DateTime
adding 15 min to a datetime
<?php
$initDate = new DateTime("2010/08/24");
$initDate->add(new DateInterval("PT15M"));
echo $initDate->format("Y/m/d m:i:s");//result: 2010/08/24 08:15:00
?>
period:
P1Y2M3DT1H2M3S
period time:
PT1H2M3S
DateTime::add
date_add
(PHP 5 >= 5.3.0)
DateTime::add -- date_add — Adds an amount of days, months, years, hours, minutes and seconds to a DateTime object
Description
Object oriented style
Procedural style
Adds the specified DateInterval object to the specified DateTime object.
Parameters
-
object -
Procedural style only: A DateTime object returned by date_create(). The function modifies this object.
-
interval -
A DateInterval object
Return Values
Returns the DateTime object for method chaining or FALSE on failure.
Examples
Example #1 DateTime::add() example
Object oriented style
<?php
$date = new DateTime('2000-01-01');
$date->add(new DateInterval('P10D'));
echo $date->format('Y-m-d') . "\n";
?>
Procedural style
<?php
$date = date_create('2000-01-01');
date_add($date, date_interval_create_from_date_string('10 days'));
echo date_format($date, 'Y-m-d');
?>
The above examples will output:
2000-01-11
Example #2 Further DateTime::add() examples
<?php
$date = new DateTime('2000-01-01');
$date->add(new DateInterval('PT10H30S'));
echo $date->format('Y-m-d H:i:s') . "\n";
$date = new DateTime('2000-01-01');
$date->add(new DateInterval('P7Y5M4DT4H3M2S'));
echo $date->format('Y-m-d H:i:s') . "\n";
?>
The above example will output:
2000-01-01 10:00:30 2007-06-05 04:03:02
Example #3 Beware when adding months
<?php
$date = new DateTime('2000-12-31');
$interval = new DateInterval('P1M');
$date->add($interval);
echo $date->format('Y-m-d') . "\n";
$date->add($interval);
echo $date->format('Y-m-d') . "\n";
?>
The above example will output:
2001-01-31 2001-03-03
Notes
DateTime::modify() is an alternative when using PHP 5.2.
See Also
- DateTime::sub() - Subtracts an amount of days, months, years, hours, minutes and seconds from a DateTime object
- DateTime::diff() - Returns the difference between two DateTime objects
- DateTime::modify() - Alters the timestamp
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User Contributed Notes
DateTime::add - [2 notes]
fortruth at mabang dot net ¶
2 years ago
Anonymous ¶
2 years ago
Note that the add() and sub() methods will modify the value of the object you're calling the method on! This is very untypical for a method that returns a value of its own type. You could misunderstand it that the method would return a new instance with the modified value, but in fact it modifies itself! This is undocumented here. (Only a side note on procedural style mentions it, but it obviously does not apply to object oriented style.)