How to find first day of the next month and remaining days till this date with PHP

Question

How can I find first day of the next month and the remaining days till this day from the present day?

Thank you

Answer 1

Create a timestamp for 00:00 on the first day of next month:

$firstDayNextMonth = strtotime('first day of next month');

The number of days til that date is the number of seconds between now and then divided by (24 * 60 * 60).

$daysTilNextMonth = ($firstDayNextMonth - time()) / (24 * 3600);

Answer 2

As another poster has mentioned the DateInterval object does not give accurate results for the next month when you use dates such as 1/31/2016 or 8/31/2016 as it skips the next month. My solution was to still use the DateInterval object but reformat your current date to be the first day of the current month prior to utilizing the DateInterval.

$currentDate = '8/31/2016';
$date = new DateTime(date("n", strtotime($currentDate))."/1/".date("Y", strtotime($currentDate)));
//add 1 month
$date->add(new DateInterval('P1M'));
$currentDate=$date->format('m/1/Y'); 

echo($currentDate);

Answer 3

I took mattbasta's approach because it's able to get the 'first day of next month' with a given date, but there is a tiny problem in calculating the $nextmonth. The fix is as below:

$now = getdate();
$nextmonth = ($now['mon'] + 1) % 13 + 1;
$year = $now['year'];
if($nextmonth == 1)
    $year++;
else
    $nextmonth--;
$thefirst = gmmktime(0, 0, 0, $nextmonth, $year);

Answer 4

Even easier way to get first and last day of next month

$first = strttotime("first day of next month");
$last = strttotime("last day of next month");

Answer 5

I initially thought about using a DateInterval object (as discussed above in another answer) but it is not reliable. For example, if the current DateTime is 31 January and then we add on a month (to get the next month) then it will skip February completely!

Here is my solution:

function start_of_next_month(DateTime $datetime)
{
    $year = (int) $datetime->format('Y');
    $month = (int) $datetime->format('n');
    $month += 1;

    if ($month === 13)
    {
        $month = 1;
        $year += 1;
    }

    return new DateTime($year . '-' . $month . '-01');
}

Answer 6

You can use DateTime object like this to find out the first day of next month like this:

$date = new DateTime('first day of next month');

You can do this to know how many days left from now to the first day of next month:

$date = new DateTime('now');
$nowTimestamp = $date->getTimestamp();
$date->modify('first day of next month');
$firstDayOfNextMonthTimestamp = $date->getTimestamp();
echo ($firstDayOfNextMonthTimestamp - $nowTimestamp) / 86400;