Get the last day of the month?

Question

Possible Duplicate:
PHP last day of the month

Is there any function like $date->getMonthDays() or $date->getLastDayOfMonth() in PHP to get the number of days in a given month (or the last day number)?

$start = new DateTime('2012-02-01');
$end   = clone $start;

// Interval = last day of the month minus current day in $start
$interval = $start->getLastDayOfMonth() - intval($start->format('j'));
$end->add(new DateInterval('P' . $interval . 'D'));

EDIT: thanks, voted to close, it's a duplicate, sorry for asking...

I don't know PHP, but generally, you can get last day by get first day of next month then -1 — Eric Yin, Jan 18 '12 at 15:30
`(DateTimeObj)->format('t');` would give you the number of days in that month. — Brad Christie, Jan 18 '12 at 15:31
@EricYin that is a good idea, i'll give it a try if there is no native PHP function, thanks a lot. — gremo, Jan 18 '12 at 15:33
With `DateTime` you can do something like this: `(new DateTime('2012-02-01'))->modify('last day of')`. — Victor, Feb 24 '16 at 16:30

score 72 · Accepted Answer · answered Jan 18 '12 at 15:32

72

The php date function gives you the number of days in the month with 't'

date("t");

See: http://php.net/manual/en/function.date.php

answered Jan 18 '12 at 15:32

Preau

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10

score 29 · Answer 2 · answered Jan 18 '12 at 15:34

29

It's simple to get last month date

echo date("Y-m-t", strtotime("-1 month") ) ;
echo date("Y-m-1", strtotime("-1 month") ) ;

at March 3 returns

2011-02-28
2011-02-1

answered Jan 18 '12 at 15:34

MartijnG

815
4
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score 6 · Answer 3 · answered Jan 18 '12 at 15:34

t gives you the total number of days in the current month. j gives you the current day of the month.

Using modify and some subtraction from format-ing the datetime, you can get to the end of the month.

$date = new DateTime();
$lastDayOfMonth = $date->modify(
  sprintf('+%d days', $date->format('t') - $date->format('j'))
);

Get the last day of the month?

3 Answers3

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