How to find the last day of the month from date?

Question

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_dat         


        

Answer 1

Using Zend_Date it's pretty easy:

$date->setDay($date->get(Zend_Date::MONTH_DAYS));

Answer 2

Here is a complete function:

public function get_number_of_days_in_month($month, $year) {
    // Using first day of the month, it doesn't really matter
    $date = $year."-".$month."-1";
    return date("t", strtotime($date));
}

This would output following:

echo get_number_of_days_in_month(2,2014);

Output: 28

Answer 3

There is also the built in PHP function cal_days_in_month()?

"This function will return the number of days in the month of year for the specified calendar." http://php.net/manual/en/function.cal-days-in-month.

echo cal_days_in_month(CAL_GREGORIAN, 11, 2009); 
// = 30

Answer 4

I have wrapped it in my date time helper class here https://github.com/normandqq/Date-Time-Helper using $dateLastDay = Model_DTHpr::getLastDayOfTheMonth();

And it is done

Answer 5

    $startDate = '2011-12-01';
    $endDate = date('Y-m');
    while (true) {
        try {
            $startDateTime = new DateTime($startDate);
            $startDateTime->add(new DateInterval('P1M'));
            $startDate = $startDateTime->format('Y-m-d');
            $endTime = $startDateTime->format('Y-m-t');
            echo $startDate . ' => ' . $endTime . PHP_EOL;
            if ($startDateTime->format('Y-m') == $endDate) {
                break;
            }
        } catch (Exception $exception) {
            var_dump($exception->getMessage());
            break;
        }
    }

After testing many solutions, this works best for me.

Answer 6

$date1 = $year.'-'.$month; 
$d = date_create_from_format('Y-m',$date1); 
$last_day = date_format($d, 't');