Sort nested associative arrays without knowing each key [duplicate] - php

Question

This question already has answers here:
Sort an array of associative arrays by column value
(23 answers)
Closed 2 years ago.
I want to sort a nested array by number. So that in each category the products with the biggest number comes first.
I tried something i found here.
How to Sort Multi-dimensional Array by Value?
usort($myArray, function($a, $b) {
$retval = $a['order'] <=> $b['order'];
if ($retval == 0) {
$retval = $a['suborder'] <=> $b['suborder'];
if ($retval == 0) {
$retval = $a['details']['subsuborder'] <=> $b['details']['subsuborder'];
}
}
return $retval;
});
but found no solution to make it work. Especially because i don't know each productnumber (e.g.sdk38z3) inside one category (e.g. chocholate - sugar - candy).
In my case i used uasort instead of usort.
Array
(
[apple - oranges - bananas] => Array
(
[fn7z3] => Array
(
[slider_details] =>
[productnumber] => fn7z3
[category] =>
[title] =>
[text] =>
[picture] =>
[number] => 30
[oneString] =>
)
)
[chocholate - sugar - candy] => Array
(
[sdk38z3] => Array
(
[slider_details] =>
[productnumber] => sdk38z3
[category] =>
[title] =>
[text] =>
[picture] =>
[number] => 45
[oneString] =>
)
[g433] => Array
(
[slider_details] =>
[productnumber] => g433
[category] =>
[title] =>
[text] =>
[picture] =>
[number] => 2
[oneString] =>
)
[j8z28] => Array
(
[slider_details] =>
[productnumber] => j8z28
[category] =>
[title] =>
[text] =>
[picture] =>
[number] => 250
[oneString] =>
)
[73hf873] => Array
(
[slider_details] =>
[productnumber] => 73hf873
[category] =>
[title] =>
[text] =>
[picture] =>
[number] => 30
[oneString] =>
)
)
Result i want:
Array
(
[apple - oranges - bananas] => Array
(
[fn7z3] => Array
(
[slider_details] =>
[productnumber] => fn7z3
[category] =>
[title] =>
[text] =>
[picture] =>
[number] => 30
[oneString] =>
)
)
[chocholate - sugar - candy] => Array
(
[j8z28] => Array
(
[slider_details] =>
[productnumber] => j8z28
[category] =>
[title] =>
[text] =>
[picture] =>
[number] => 250
[oneString] =>
)
[sdk38z3] => Array
(
[slider_details] =>
[productnumber] => sdk38z3
[category] =>
[title] =>
[text] =>
[picture] =>
[number] => 45
[oneString] =>
)
[73hf873] => Array
(
[slider_details] =>
[productnumber] => 73hf873
[category] =>
[title] =>
[text] =>
[picture] =>
[number] => 30
[oneString] =>
)
[g433] => Array
(
[slider_details] =>
[productnumber] => g433
[category] =>
[title] =>
[text] =>
[picture] =>
[number] => 2
[oneString] =>
)
)

Answer 1

I finally found a solution for my problem, by using a function given in this answer:
How to sort an array of associative arrays by value of a given key in PHP?
Because i don't really know the key i need i used a foreach loop with the $key functionality.
I needed to override my actual array with the sorted array too, to make changes permanent.
In my case, as i said, im using uasort instead of usort, because im using names as Key.
Explanation of variables:
$similarProducts = my whole array.
$attributeCombination = for Example [apple - oranges - bananas]
function invenDescSort($item1, $item2)
{
if ($item1['number'] == $item2['number']) return 0;
return ($item1['number'] < $item2['number']) ? 1 : -1;
}
foreach ($similarProducts AS $key => $attributeCombination) {
uasort($attributeCombination, 'invenDescSort');
$this->similarProducts[$key] = $attributeCombination;
//print_r($attributeCombination);
}