DateTime
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DateTime::format

date_format

(PHP 5 >= 5.2.0)

DateTime::format -- date_format — Returns date formatted according to given format

说明

面向对象风格

public string DateTime::format ( string $format )

过程化风格

string date_format ( DateTime $object , string $format )

Returns date formatted according to given format.

参数

object

仅为过程化风格：由 date_create() 返回的 DateTime 类型的对象。

format

Format accepted by date().

返回值

Returns the formatted date string on success 或者在失败时返回 FALSE.

范例

Example #1 DateTime::format() example

面向对象风格

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

过程化风格

<?php
$date = date_create('2000-01-01');
echo date_format($date, 'Y-m-d H:i:s');
?>

以上例程会输出：

2000-01-01 00:00:00

注释

This method does not use locales. All output is in English.

参见

DateTime
在线手册：中文 英文
PHP手册
PHP手册 - N: Returns date formatted according to given format

用户评论:

craig dot constable at gmail dot com (02-Mar-2012 12:24)

Using a datetime field from a mysql database e.g. "2012-03-24 17:45:12"

<?php

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

echo 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

?>

ca at agercon dot dk (01-Jul-2011 04:16)

The date_format can be use to get the last day of February:

<?php

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");
        return $return;
}

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

?>

James Meyer (06-Jan-2011 07:49)

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.

eggerjohansi at gmail dot com (21-Apr-2010 05:04)

if you want to use e.g. german weekdays you could add the following class as a temporary solution...
<?php
class DateTimeGerman extends DateTime {
    public function format($format) {
        $english = array('Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday');
        $german = array('Montag', 'Dienstag', 'Mittwoch', 'Donnerstag', 'Freitag', 'Samstag', 'Sonntag');
        return str_replace($english, $german, parent::format($format));
    }
}
?>
it hasn't anything to do with nice programming but it works if you construct a
<?php
$dt = new DateTimeGerman();
?>
instead of
<?php
$dt = new DateTime();
?>