Laravel - Collections - Method Map

The map method iterates through the collection and passes each value to the given callback. The callback is free to modify the item and return it, thus forming a new collection of modified items:

    $collection = collect([1, 2, 3, 4, 5]);
    $multiplied = $collection->map(function ($item, $key) {
        return $item * 2;
    // [2, 4, 6, 8, 10]
Like most other collection methods, map returns a new collection instance; it does not modify the collection it is called on. If you want to transform the original collection, use the transform method.