Get the nearest date in the future - php

Question

I would like to get the first date in the future from an array of dates. I've tried to write my own function, which did not get the job done.
private static function getClosestDate($date, array $dates, $last) {
$interval = array();
$now = strtotime(date('Y-m-d'));
foreach ($dates as $d) {
$dateTime = strtotime($date);
$toTime = strtotime($d);
// Do not parse dates older than today
if (strtotime($d) < $now) { continue 1; }
// Only do dates in the future
if ($toTime < $dateTime) { continue 1; }
$interval[] = abs($dateTime - $toTime);
}
// If there is no interval, use the latest date
if (!count($interval)) {
return $last;
}
asort($interval);
$closest = key($interval);
return $dates[$closest];
}
This code works but it also works the other way around. Next to that, when there is no last date, it should use the $last parameter which is the last date.
The reason I want to know this is because I have a range of dates on which people can book nights on. I want to know the difference in days to calculate the amount of nights they can book. Calculating a difference in dates is easy, but I do need to know when the next booking appears. These are provided in the $dates parameter.
What should I change in my code to get it fixed (I've tried to continue the foreach whenever the date was in the past based on the $date parameter) or can someone provide me the code?

Answer 1

I've fixed the problem myself. Instead of using the dates array I'm now using the date as key in the interval to retrieve the date again. This does work properly.
private static function getClosestDate($date, array $dates, $last) {
$interval = array();
$now = strtotime(date('Y-m-d'));
foreach ($dates as $d) {
$dateTime = strtotime($date);
$toTime = strtotime($d);
// Do not parse dates older than today
if (strtotime($d) < $now) { continue 1; }
// Only do dates in the future
if ($toTime < $dateTime) { continue 1; }
$interval[$d] = abs($dateTime - $toTime);
}
// If there is no interval, use the latest date
if (!count($interval)) {
return $last;
}
asort($interval);
$closest = key($interval);
return $closest;
}