PHP round time() up (future) to next multiple of 5 minutes

Question

How do I round the result of time() up (towards the future) to the next multiple of 5 minutes?

Answer 1

For people using Carbon (such as people using Laravel), this can help:

/**
 * 
 * @param \Carbon\Carbon $now
 * @param int $nearestMin
 * @param int $minimumMinutes
 * @return \Carbon\Carbon
 */
public static function getNearestTimeRoundedUpWithMinimum($now, $nearestMin = 30, $minimumMinutes = 8) {
    $nearestSec = $nearestMin * 60;
    $minimumMoment = $now->addMinutes($minimumMinutes);
    $futureTimestamp = ceil($minimumMoment->timestamp / $nearestSec) * $nearestSec; 
    $futureMoment = Carbon::createFromTimestamp($futureTimestamp);
    return $futureMoment->startOfMinute();
}

These test assertions pass:

public function testGetNearestTimeRoundedUpWithMinimum() {
    $this->assertEquals('2018-07-07 14:00:00', TT::getNearestTimeRoundedUpWithMinimum(Carbon::parse('2018-07-06 14:12:59'), 60, 23 * 60 + 10)->format(TT::MYSQL_DATETIME_FORMAT));
    $this->assertEquals('2018-07-06 14:15:00', TT::getNearestTimeRoundedUpWithMinimum(Carbon::parse('2018-07-06 14:12:59'), 15, 1)->format(TT::MYSQL_DATETIME_FORMAT));
    $this->assertEquals('2018-07-06 14:30:00', TT::getNearestTimeRoundedUpWithMinimum(Carbon::parse('2018-07-06 14:12:59'), 30, 10)->format(TT::MYSQL_DATETIME_FORMAT));
    $this->assertEquals('2018-07-06 16:00:00', TT::getNearestTimeRoundedUpWithMinimum(Carbon::parse('2018-07-06 14:52:59'), 60, 50)->format(TT::MYSQL_DATETIME_FORMAT));
    $this->assertEquals(Carbon::parse('tomorrow 15:00:00'), TT::getNearestTimeRoundedUpWithMinimum(Carbon::parse('16:30'), 60, 60 * 22 + 30));
}