add $_GET laravel code example

Example 1: laravel findorfail

$model = App\Flight::where('name', 'Mike')->firstOrFail();

Example 2: laravel find by

// Retrieve a model by its primary key...
$flight = App\Flight::find(1);

// Retrieve the first model matching the query constraints...
$flight = App\Flight::where('active', 1)->first();

// Shorthand for retrieving the first model matching the query constraints...
$flight = App\Flight::firstWhere('active', 1);