Sort associative array by level 4 in php - php

Question

Here is my sample array, I would like to sort this array based on ShipPrice value which is comes on level 4 of this array, how can we do this in PHP ?
Array
(
[0] => Array
(
[ShippingTypes] =>
[SelectedShipName] =>
[SelectedShipId] =>
[SelectedShipPrice] =>
[MethodName] => UPS
[MethodId] => 6
[SelectedDeliveryDays] =>
[PackageCount] => 1
)
[1] => Array
(
[ShippingTypes] => Array
(
[44] => Array
(
[ShipName] => Local pick up
[ShipPrice] => 12
[DeliveryDays] =>
)
)
[SelectedShipName] => Local pick up
[SelectedShipPrice] => 12
[SelectedShipId] => 44
[MethodName] => Quantity Based
[MethodId] => 3
[SelectedDeliveryDays] =>
)
[2] => Array
(
[ShippingTypes] => Array
(
[1] => Array
(
[ShipName] => KP Office
[ShipPrice] => 10
[DeliveryDays] => 0
)
[2] => Array
(
[ShipName] => Sachet
[ShipPrice] => 15
[DeliveryDays] => 5
)
)
[SelectedShipName] => KP Office
[SelectedShipPrice] => 10
[SelectedShipId] => 1
[MethodName] => Local Pickup From Store
[MethodId] => -1
[SelectedDeliveryDays] => 0
)
)

Answer 1

You can do it using usort and the max ShipPrice you get for all shipping types (supposing that you actually want to check against the max):
usort($results, static function(array $a, array $b) {
return price($a) <=> price($b);
});
function price(array $array): int
{
$shippingTypes = (array) $array['ShippingTypes'];
if (empty($shippingTypes)) {
return 0;
}
return max(array_column($shippingTypes, 'ShipPrice'));
}