PHP - create date range array with values from multi array key search - php

Question

I have multi array created from previous search. Point of this is enable hotel reservation in case hotel is full and quests must change room during stay. So array $freeRooms is created as array of free room by dates.
$freeRooms = array(
0 => array
(
'2020-07-23' => 37
),
1 => array
(
'2020-07-20' => 38,
'2020-07-21' => 38,
'2020-07-22' => 38
),
2 => array
(
'2020-07-25' => 38,
'2020-07-26' => 38
),
2 => array
(
'2020-07-20' => 59,
'2020-07-21' => 59
),
3 => array
(
'2020-07-20' => 86,
'2020-07-21' => 86
),
4 => array
(
'2020-07-20' => 39,
'2020-07-21' => 39
),
5 => array
(
'2020-07-25' => 39,
'2020-07-26' => 39
),
6 => array
(
'2020-07-20' => 40
),
7 => array
(
'2020-07-24' => 40,
'2020-07-25' => 40,
'2020-07-26' => 40
),
8 => array
(
'2020-07-20' => 41,
'2020-07-21' => 41,
'2020-07-22' => 41,
'2020-07-23' => 41
));
Second array is date range:
$dateRange = array(0 => '2020-07-20',
1 => '2020-07-21',
2 => '2020-07-22',
3 => '2020-07-23',
4 => '2020-07-24',
5 => '2020-07-25',
6 => '2020-07-26');
I need create some final array for every day from $dateRange use some rooms from $freeRooms. Point is to use as minimal id rooms as possible to get something like this:
$finalArray = array('2020-07-20' => 41,
'2020-07-21' => 41,
'2020-07-22' => 41,
'2020-07-23' => 41,
'2020-07-24' => 40,
'2020-07-25' => 40,
'2020-07-26' => 40);

Answer 1

This is my actual solution:
order by count of free days
array_multisort(array_map('count', $freeRooms), SORT_DESC, $freeRooms);
set $dateRange keys same as values
$newRange = array_combine($dateRange, $dateRange);
$finalRms = array();
loop and create new array
foreach($ffa as $k => $v) {
foreach($newRange as $nk => $nv) {
if(array_key_exists($nk, $v) && array_key_exists($nk, $finalRms) == false) {
$finalRms[$nk] = $v[$nk];
}
}
}