Numeric route validation?

Question

In Laravel what is correct way to do route parameter validation to ensure the id (GET) is numeric?

I am currently doing this way:

public function run($id, Request $request)
{
    if (!is_numeric($id)) {
        return response()->json([
            'success' => false,
            'message'      => 'ID must be numeric'
        ]);
    }

  // Do something else
}

Answer 1

Do it in your routes themselves, using a regular expression constraint.

Route::get('user/{id}', function ($id) {
    //
})->where('id', '[0-9]+');

The ->where('id', '[0-9]+') will cause the route to only be valid for numeric values of id. Accessing user/foo will result in a 404.