Eloquent sortBy - Specify asc or desc

https://laravel.com/docs/5.8/collections#method-sortby

https://laravel.com/api/4.2/Illuminate/Database/Eloquent/Collection.html#method_sortBy

$collection->sortBy('field', [], true); // true for descending

To sort by ASC: Laravel Docs - sortBy()

$collection->sortBy('field');

To sort by DESC: Laravel Docs - sortByDesc()

$collection->sortByDesc('field');

In 4.2, the second parameter needs to be an int, SORT_REGULAR is default

https://laravel.com/api/4.2/Illuminate/Database/Eloquent/Collection.html#method_sortBy

$collection->sortBy('field', SORT_REGULAR, true); //true for descending

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