(PHP 5 >= 5.2.0)
DateTime::format -- DateTimeImmutable::format -- DateTimeInterface::format -- date_format — Returns date formatted according to given format
面向对象风格
$format
)$format
)$format
)过程化风格
Returns date formatted according to given format.
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().
Returns the formatted date string on success 或者在失败时返回 FALSE.
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
This method does not use locales. All output is in English.
craig dot constable at gmail dot com (2012-03-02 04:24:37)
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 (2011-07-01 08:16:09)
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 $return;
}
echo last_day_of_feb(2011) . "\n"; # 2011-02-28
echo last_day_of_feb(2012) . "\n"; # 2011-02-29
?>
James Meyer (2011-01-06 11:49:12)
A note about version differences - the results of this function differ significantly from php 5.2.x to 5.3.x .
The 5.2 implementations will often parse to non-sensical values, such as:
1964/11-12: 1964/-99999/-99999
12/11-1964: -99999/12/11
12-31-1964: -99999/-99999/-99999
11121875: 1112/01/187
01321901: 0132/01/190
(this one makes sense, but was a poor guess)
31/12/1964: 1964/01/12
In 5.3+, these all come back as false, as I would expect. 5.2 was just a little optimistic about it's ability to parse dates, I guess.
eggerjohansi at gmail dot com (2010-04-21 09:04:46)
if you want to use e.g. german weekdays you could add the following class as a temporary solution...
<?php
class DateTimeGerman extends DateTime {
public function format($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();
?>