<?php
$hours = ["08:00:00", "18:00:00"];
$bookings = [["10:00:00", "15:00:00"],
["08:05:00", "09:00:00"],
["16:00:00", "17:00:00"]
];
$start = $hours[0];
$end = $hours[1];
// sort the bookings
$bstart = array_column($bookings, 0);
array_multisort($bstart, $bookings);
// get the free times
$time = $start;
$bindex = 0;
$free = array();
while ($time < $end && $bindex < count($bookings)) {
if ($time < $bookings[$bindex][0]) {
$free[] = [$time, $bookings[$bindex][0]];
}
$time = $bookings[$bindex][1];
$bindex++;
}
// end of day free?
if ($time < $end) {
$free[] = [$time, $end];
}
print_r($free);
preferences:
33.23 ms | 402 KiB | 5 Q