How can I get the last day of the month in PHP?
Given:
$a_date = "2009-11-23"
I want 2009-11-30; and given
$a_date = "2009-12-23"
I want 2009-12-31.
php
date
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Answers
2
You can compare the day of the month before and after you add 1 month. If it's not the same, you exceeded the next month.
function add($date_str, $months)
{
$date = new DateTime($date_str);
// We extract the day of the month as $start_day
$start_day = $date->format('j');
// We add 1 month to the given date
$date->modify("+{$months} month");
// We extract the day of the month again so we can compare
$end_day = $date->format('j');
if ($start_day != $end_day)
{
// The day of the month isn't the same anymore, so we correct the date
$date->modify('last day of last month');
}
return $date;
}
$result = add('2011-01-28', 1); // 2011-02-28
$result = add('2011-01-31', 3); // 2011-04-30
$result = add('2011-01-30', 13); // 2012-02-29
$result = add('2011-10-31', 1); // 2011-11-30
$result = add('2011-12-30', 1); // 2011-02-28
Sunday, September 18, 2022
4
you need to escape the a and t as both have special meaning when used as formatting options in date()
echo date('M j at h:i a');
See it in action
Monday, October 17, 2022
3
You don't need to change the php.ini file if you use date_default_timezone_set(). Just set it to the timezone you will be working in.
Something like this should go in a config file or on the page where you're working with dates (if it is only one page):
date_default_timezone_set('America/Los_Angeles');
Friday, December 23, 2022
1
calendar.monthrange provides this information:
calendar.monthrange(year, month)
Returns weekday of first day of the month and number of days in month, for the specified year and month.
>>> import calendar
>>> calendar.monthrange(2002, 1)
(1, 31)
>>> calendar.monthrange(2008, 2) # leap years are handled correctly
(4, 29)
>>> calendar.monthrange(2100, 2) # years divisible by 100 but not 400 aren't leap years
(0, 28)
so:
calendar.monthrange(year, month)[1]
seems like the simplest way to go.
Friday, August 19, 2022
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treturns the number of days in the month of a given date (see the docs fordate):