sortByArray - helper function to sort Array with Array.

sortByArray.php

<?php

function sortByArray($array, $sortOrder, $options = SORT_REGULAR, $descending = false)
{
    // Before first! LOL
    // I just extend sortBy in Laravel collection to can use with normal array
    // and it will sort data from another array.
    // Perfect!!

    // Before first. We will add diff array index to last item of sortOrder
    // this will protect error and make another value that don't appear in sortOrder
    // will stay at last of array
    foreach ($array as $key => $value) {
        if (!in_array($key, $sortOrder)) {
            $sortOrder[] = $key;
        }
    }

    $results = [];

    // First we will loop through the items and get the comparator from a callback
    // function which we were given. Then, we will sort the returned values and
    // and grab the corresponding values for the sorted keys from this array.
    foreach ($array as $key => $value) {
        $results[$key] = array_search($key, $sortOrder);
    }

    $descending ? arsort($results, $options)
                : asort($results, $options);

    // Once we have sorted all of the keys in the array, we will loop through them
    // and grab the corresponding model so we can set the underlying items list
    // to the sorted version. Then we'll just return the collection instance.
    foreach (array_keys($results) as $key) {
        $results[$key] = $array[$key];
    }

    return $results;
}

// Example
$array = [
    'dummy' => '777',
    'id' => 1,
    'description' => 'NA',
    'title' => 'My title'
];
$sortOrder = [
    'id',
    'title',
    'description',
];
$array = sortByArray($array, $sortOrder);
var_dump($array);

// Result
/*
array:4 [▼
  "id" => 1
  "title" => "My title"
  "description" => "NA"
  "dummy" => "777"
]
*/

why that complicated, any difference from

function sortByArray($array, $sortOrder, $descending = false) {
  $result = array_merge(array_intersect_key(array_flip($sortOrder), $array), $array);
  return $descending ? array_reverse($result) : $result;
}

?