<?php
function splitAndMergeDateRanges(array $dateRanges): array
{
if (empty($dateRanges)) {
return [];
}
// First, sort the date ranges by their start date
usort($dateRanges, function($a, $b) {
return strcmp($a['start'], $b['start']);
});
$mergedRanges = [];
$currentRange = $dateRanges[0];
foreach ($dateRanges as $range) {
if ($range['start'] <= $currentRange['end']) {
// If the current range overlaps with the new range, merge them
$currentRange['end'] = max($currentRange['end'], $range['end']);
} else {
// If they don't overlap, add the current range to the merged list
$mergedRanges[] = $currentRange;
// and start a new range
$currentRange = $range;
}
}
// Don't forget to add the last range
$mergedRanges[] = $currentRange;
return $mergedRanges;
}
// Example input
$dateRanges = [
["start" => "2024/06/11", "end" => "2024/06/12"],
["start" => "2024/06/12", "end" => "2024/06/13"],
["start" => "2024/06/13", "end" => "2024/06/14"],
["start" => "2024/06/15", "end" => "2024/06/16"],
["start" => "2024/06/16", "end" => "2024/06/17"],
["start" => "2024/06/17", "end" => "2024/06/18"],
["start" => "2024/06/18", "end" => "2024/06/19"],
["start" => "2024/06/19", "end" => "2024/06/20"],
["start" => "2024/06/20", "end" => "2024/06/21"],
["start" => "2024/06/22", "end" => "2024/06/23"],
["start" => "2024/06/23", "end" => "2024/06/24"],
["start" => "2024/06/24", "end" => "2024/06/25"],
["start" => "2024/06/25", "end" => "2024/06/26"],
["start" => "2024/06/26", "end" => "2024/06/27"],
["start" => "2024/06/27", "end" => "2024/06/28"],
["start" => "2024/06/28", "end" => "2024/06/29"],
["start" => "2024/06/29", "end" => "2024/06/30"]
];
print_r(splitAndMergeDateRanges($dateRanges));
splitAndMergeDateRanges($dateRanges);
preferences:
30.78 ms | 407 KiB | 5 Q