I have an array of product ids against which I need to retrieve the model collection. The array is something like this:

```
$ids = array(9, 2, 16, 11, 8, 1, 18);

```

Right now, I'm using the following line of code to get the collection.

```
$products = Product::whereIn('id', $ids)->get();

```

But it sorts the products against their ids. such as: `1, 2, 8, 9, 11, 16, 18`. What I need is the same order as in the `$ids` array i.e `9, 2, 16, 11, 8, 1, 18`. 

What should I do to get the same order as in the array?