PHP 7.1.0 Release Candidate 4 Released


(PHP 5 >= 5.2.0)

DateTime::formatبازگرداندن تاریخ قالب‌بندی شده متناسب با قالب داده شده


Oriented object style

public string DateTime::format ( string $format )

Procedural style

string date_format ( DateTime $object , string $format )

بازگرداندن تاریخ قالب‌بندی شده متناسب با قالب داده شده.



Procedural style only: A DateTime object returned by date_create()


قالب پذیرفته شده توسط date().

Return Values

بازگرداندن تاریخ قالب‌بندی شده در صورت موفقیت or FALSE on failure.


Example #1 مثال DateTime::format()

Oriented object style

= new DateTime('2000-01-01');
$date->format('Y-m-d H:i:s');

Procedural style

date_format($date'Y-m-d H:i:s');

The above example will output:

2000-01-01 00:00:00


این متد از locales استفاده نمی‌کند. تمام خروجی‌ها انگلیسی است.

See Also

  • date() - Format a local time/date
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User Contributed Notes 8 notes

craig dot constable at gmail dot com
4 years ago
Using a datetime field from a mysql database e.g. "2012-03-24 17:45:12"


= mysql_query("SELECT `datetime` FROM `table`");
$row = mysql_fetch_row($result);
$date = date_create($row[0]);

date_format($date, 'Y-m-d H:i:s');
#output: 2012-03-24 17:45:12

echo date_format($date, 'd/m/Y H:i:s');
#output: 24/03/2012 17:45:12

echo date_format($date, 'd/m/y');
#output: 24/03/12

echo date_format($date, 'g:i A');
#output: 5:45 PM

echo date_format($date, 'G:ia');
#output: 05:45pm

echo date_format($date, 'g:ia \o\n l jS F Y');
#output: 5:45pm on Saturday 24th March 2012

daysnine at gmail dot com
2 years ago
Seems like datetime::format does not really support microseconds as the documentation under date suggest it will.

Here is some code to generate a datetime with microseconds and timezone:

private function udate($format = 'u', $utimestamp = null) {
        if (is_null($utimestamp))
            $utimestamp = microtime(true);

        $timestamp = floor($utimestamp);
        $milliseconds = round(($utimestamp - $timestamp) * 1000000);

        return date(preg_replace('`(?<!\\\\)u`', $milliseconds, $format), $timestamp);

echo udate('Y-m-d H:i:s.u T');
// Will output something like: 2014-01-01 12:20:24.42342 CET
soul dot enforcer at gmail dot com
2 years ago
For full reference of the supported format character and results,
see the documentation of date() :
ca at agercon dot dk
5 years ago
The date_format can be use to get the last day of February:


function last_day_of_feb ($year) {
# The 0th day of a month is the same as the last day of the month before
$ultimo_feb_str = $year . "-03-00";
$ultimo_feb_date = date_create($ultimo_feb_str);
$return = date_format($ultimo_feb_date, "Y-m-d");

last_day_of_feb(2011) . "\n"; # 2011-02-28
echo last_day_of_feb(2012) . "\n"; # 2011-02-29

chris at codewiz dot biz
2 years ago
I believe this is a bug but its note-worthy if it is intended (I am using PHP 5.5.3).

$ php --version

PHP Warning:  Module 'xdebug' already loaded in Unknown on line 0
PHP 5.5.3-1ubuntu2.1 (cli) (built: Dec 12 2013 04:24:35)
Copyright (c) 1997-2013 The PHP Group
Zend Engine v2.5.0, Copyright (c) 1998-2013 Zend Technologies
    with Xdebug v2.2.3, Copyright (c) 2002-2013, by Derick Rethans
    with Zend OPcache v7.0.3-dev, Copyright (c) 1999-2013, by Zend Technologies

What is happening:

DateTime()->format() will modify the timezone. So do not expect the public date property to be returned (format mask applied) based on the current public timezone property. format will decide that when calling ->format() it will use the server timezone which eliminates all usefulness of ->setTimezone().

= new \DateTime( 'now',  new \DateTimeZone( 'UTC' ) );
$nowUtc = new \DateTime( 'now',  new \DateTimeZone( 'UTC' ) );
'$nowUtc->format(\'Y-m-d h:i:s\')'.PHP_EOL;
var_dump($nowUtc->format('Y-m-d h:i:s'));
$nowUtc->setTimezone( new \DateTimeZone( 'Australia/Sydney' ) );
'$nowUtc->setTimezone( new \DateTimeZone( \'Australia/Sydney\' ) )'.PHP_EOL;
'$nowUtc->format(\'Y-m-d h:i:s\')'.PHP_EOL;
var_dump($nowUtc->format('Y-m-d h:i:s'));exit;



  public 'date' => string '2014-02-13 02:42:48' (length=19)
  public 'timezone_type' => int 3
  public 'timezone' => string 'UTC' (length=3)

$nowUtc->format('Y-m-d h:i:s')

string '2014-02-13 02:42:48' (length=19)

$nowUtc->setTimezone( new \DateTimeZone( 'Australia/Sydney' ) )

  public 'date' => string '2014-02-13 13:42:48' (length=19)
  public 'timezone_type' => int 3
  public 'timezone' => string 'Australia/Sydney' (length=16)

$nowUtc->format('Y-m-d h:i:s')

string '2014-02-13 01:42:48' (length=19) // expected 2014-02-13 13:42:48 based on Australia/Sydney - what is 2014-02-13 01:42:48 from anyway!
prussell at cloudworksconsulting dot com
2 years ago
The udate function is a great start, but the formatting of the milliseconds is a little off. If it is within the first 100000 microseconds then the string will be less than 6 characters, so 0.012435 will appear as 0.12345. The revision below fixes this.

function udate($strFormat = 'u', $uTimeStamp = null)

    // If the time wasn't provided then fill it in
    if (is_null($uTimeStamp))
        $uTimeStamp = microtime(true);

    // Round the time down to the second
    $dtTimeStamp = floor($uTimeStamp);

    // Determine the millisecond value
    $intMilliseconds = round(($uTimeStamp - $dtTimeStamp) * 1000000);
    // Format the milliseconds as a 6 character string
    $strMilliseconds = str_pad($intMilliseconds, 6, '0', STR_PAD_LEFT);

    // Replace the milliseconds in the date format string
    // Then use the date function to process the rest of the string
    return date(preg_replace('`(?<!\\\\)u`', $strMilliseconds, $strFormat), $dtTimeStamp);
James Meyer
5 years ago
A note about version differences - the results of this function differ significantly from php 5.2.x to 5.3.x . 

The 5.2 implementations will often parse to non-sensical values, such as:

1964/11-12: 1964/-99999/-99999
12/11-1964: -99999/12/11
12-31-1964: -99999/-99999/-99999
11121875: 1112/01/187
01321901: 0132/01/190

(this one makes sense, but was a poor guess)
31/12/1964: 1964/01/12

In 5.3+, these all come back as false, as I would expect.  5.2 was just a little optimistic about it's ability to parse dates, I guess.
3 years ago
Date and Time with split seconds

$micro_date = microtime();
$date_array = explode(" ",$micro_date);
$date = date("Y-m-d H:i:s",$date_array[1]);
echo "Date: $date:" . $date_array[0]."<br>";
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