Check if record exists or show 404

Don't use find() and then check if the record exists. Use findOrFail().

1$product = Product::find($id);
2if (!$product) {
3    abort(404);
4}
5$product->update($productDataArray);

Shorter way

1$product = Product::findOrFail($id); // shows 404 if not found
2$product->update($productDataArray);