DateTime::diff
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
?>
DateTime::format
date_format
(PHP 5 >= 5.2.0)
DateTime::format -- date_format — Returns date formatted according to given format
Beschreibung
Objektorientierter Stil
public string DateTime::format
( string $format
)
Prozeduraler Stil
Returns date formatted according to given format.
Parameter-Liste
- object
-
Nur bei prozeduralem Aufruf: Ein von date_create() zurückgegebens DateTime Objekt.
- format
-
Format accepted by date().
Rückgabewerte
Returns the formatted date string on successIm Fehlerfall wird FALSE zurückgegeben..
Beispiele
Beispiel #1 DateTime::format() example
Objektorientierter Stil
<?php
$date = new DateTime('2000-01-01');
echo $date->format('Y-m-d H:i:s');
?>
Prozeduraler Stil
<?php
$date = date_create('2000-01-01');
echo date_format($date, 'Y-m-d H:i:s');
?>
Das oben gezeigte Beispiel erzeugt folgende Ausgabe:
2000-01-01 00:00:00
Anmerkungen
This method does not use locales. All output is in English.
Siehe auch
- date() - Formatiert ein(e) angegebene(s) Ortszeit/Datum
add a note
User Contributed Notes
DateTime::format
ca at agercon dot dk
01-Jul-2011 08:16
James Meyer
06-Jan-2011 11:49
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 09:04
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();
?>