if id not found than insert or delete in laravel 5.8 code example

Example 1: update or create laravel

$user = User::updateOrCreate(['name' => request()->name], [ 
    'foo' => request()->foo
]);

Example 2: laravel create or update

// If there's a flight from Oakland to San Diego, set the price to $99.
// If no matching model exists, create one.
$flight = App\Models\Flight::updateOrCreate(
    ['departure' => 'Oakland', 'destination' => 'San Diego'],
    ['price' => 99, 'discounted' => 1]
);