DateTime::setDate

(PHP 5 >= 5.2.0)

DateTime::setDateتنظیم تاریخ

Description

Oriented object style

public DateTime DateTime::setDate ( int $year , int $month , int $day )

Procedural style

DateTime date_date_set ( DateTime $object , int $year , int $month , int $day )

بازنشانی تاریخ فعلی شی DateTime به تاریخ دیگر.

Parameters

object

Procedural style only: A DateTime object returned by date_create(). The function modifies this object.

year

سال تاریخ.

month

ماه تاریخ.

day

روز تاریخ.

Return Values

Returns the DateTime object for method chaining or FALSE on failure.

Changelog

Version Description
5.3.0Changed the return value from NULL to DateTime.

Examples

Example #1 مثال DateTime::setDate()

Oriented object style

<?php
$date 
= new DateTime();
$date->setDate(200123);
echo 
$date->format('Y-m-d');
?>

Procedural style

<?php
$date 
date_create();
date_date_set($date200123);
echo 
date_format($date'Y-m-d');
?>

The above examples will output:

2001-02-03

Example #2 مقادیر خارج از بازه به مقادیر والد آنها اضافه می‌شوند

<?php
$date 
= new DateTime();

$date->setDate(2001228);
echo 
$date->format('Y-m-d') . "\n";

$date->setDate(2001229);
echo 
$date->format('Y-m-d') . "\n";

$date->setDate(2001143);
echo 
$date->format('Y-m-d') . "\n";
?>

The above example will output:

2001-02-28
2001-03-01
2002-02-03

See Also

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User Contributed Notes 5 notes

up
4
indjeto at mail dot bg
2 months ago
I found a bug:
$date = new \DateTime('first day of this month');
$date->setDate(2001, 2, 3);
echo $date->format('Y-m-d');

This outputs: 2001-02-01
The day never changes.
up
6
remy215 at laposte dot net
5 years ago
Be warned, DateTime::setDate() does not check for invalid input.

Illustration:
<?php
$dt
= new DateTime();
$dt->setDate(2012, 11, 31); // returns DateTime object and not false although this date does not exist
echo $dt->format('Y-m-d'); // output: 2012-12-01
?>

No error was generated on entering a non existing date, php silently changed it.
up
0
rick at sublymesystems dot com
1 month ago
Indjeto: You creating the datetime object with the first day of the month you are currently in when you initialize the object. Then you reset the date to the date you entered. Then you output, which is the day you entered because thats what you set it to. If you want to see the result you are assumed to be expecting you should not run the setDate() method.
up
0
kevin dot nadin at gmail dot com
1 month ago
Correction on the previous comment :

Bug fixed in php 7.0.17 and 7.1.3, for the version 7.0.0 to 7.0.16 and 7.1.0 to 7.1.2, the bug is still present
up
0
kevin dot nadin at gmail dot com
1 month ago
Be carreful about this bug in php 5.6 and lower (fixed in php 7.0 and higher) :

<?php
$date
= new DateTime("first day of last month");
echo
$date->format('Y-m-d');
echo 
' => ' ;
$date->setDate(2013, 2, 3);
echo
$date->format('Y-m-d');
?>

Output <=5.6 : 2017-03-01 => 2013-02-01
Output >=7.0 : 2017-03-31 => 2013-02-03

Same goes for "Last day of last month", and the funny part, it will take the last day of the new month setted by setDate

Example with a Leap Year :
<?php
$date
= new DateTime("last day of last month");
echo
$date->format('Y-m-d');
echo 
' => ' ;
$date->setDate(2012, 2, 3);
echo
$date->format('Y-m-d');
?>

Output <=5.6 : 2017-03-31 => 2012-02-29
Output >=7.0 : 2017-03-31 => 2012-02-03
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