How do I sort a multidimensional array? [duplicate] - php

Question

This question already has answers here:
How to Sort a Multi-dimensional Array by Value
(16 answers)
Closed 5 years ago.
I'm tracking how many words appear in the description of my products and created a multidimensional array that is keeping track but I need to sort them by the most found keywords to the lowest. I have this array and I want to be able to sort it by the "count" key:
Array
(
[KOM1-K182924DA] => Array
(
[count] => 1
[words] => Array
(
[4] => cotton
)
)
[PVH1-U2666001] => Array
(
[count] => 2
[words] => Array
(
[2] => cotton
[5] => briefs
)
)
[GEO2-K2345TF] => Array
(
[count] => 1
[words] => Array
(
[4] => red
)
)
[KOM1-K182871HK] => Array
(
[count] => 3
[words] => Array
(
[4] => cotton
[5] => nylon
[6] => blue
)
)
)
So the result would look like this:
Array
(
[KOM1-K182871HK] => Array
(
[count] => 3
[words] => Array
(
[4] => cotton
[5] => nylon
[6] => blue
)
)
[PVH1-U2666001] => Array
(
[count] => 2
[words] => Array
(
[2] => cotton
[5] => briefs
)
)
[KOM1-K182924DA] => Array
(
[count] => 1
[words] => Array
(
[4] => cotton
)
)
[GEO2-K2345TF] => Array
(
[count] => 1
[words] => Array
(
[4] => red
)
)
)
How can I do this? I've tried multiple solutions that I found on stackoverflow but none of them have worked for me. I've tried the solution on here Sort Multi-dimensional Array by Value. I'm using PHP 5.6 so I tried this:
usort($myArray, function($a, $b) {
return $a['order'] - $b['order'];
});
But it's not returning an array, instead it returns the "sku" and a digit.

Answer 1

Extract the count column into a single dimension, sort that descending and sort the original array by that:
array_multisort(array_column($myArray, 'count'), SORT_DESC, $myArray);

Answer 2

you may use array_multisort or usort
working solution:
function sortBySubValue($array, $value, $asc = true, $preserveKeys = false)
{
if ($preserveKeys) {
$c = array();
if (is_object(reset($array))) {
foreach ($array as $k => $v) {
$b[$k] = strtolower($v->$value);
}
} else {
foreach ($array as $k => $v) {
$b[$k] = strtolower($v[$value]);
}
}
$asc ? asort($b) : arsort($b);
foreach ($b as $k => $v) {
$c[$k] = $array[$k];
}
$array = $c;
} else {
if (is_object(reset($array))) {
usort($array, function ($a, $b) use ($value, $asc) {
return $a->{$value} == $b->{$value} ? 0 : ($a->{$value} - $b->{$value}) * ($asc ? 1 : -1);
});
} else {
usort($array, function ($a, $b) use ($value, $asc) {
return $a[$value] == $b[$value] ? 0 : ($a[$value] - $b[$value]) * ($asc ? 1 : -1);
});
}
}
return $array;
}
sortBySubValue($array, 'count', false, true);