What methods do laravel call controllers?

Laravel calls controller methods: 1. Route call, use route definition to specify the requested URL and corresponding controller method; 2. Middleware call, execute some before or after the request reaches the controller method Operation, you can use middleware in the controller to call other controller methods; 3. Auxiliary function call, use the auxiliary function to call other controller methods between controller methods; 4. Dependency injection call, you can directly transfer the requested parameters Inject into the controller method to call the controller method.

The operating environment of this article: Windows 10 system, Laravel9.x version, Dell G3 computer.

In Laravel, controller methods can be called in many ways. Several common methods are discussed below.

Routing calls controller methods

In Laravel, routing is the main way to call controller methods. You can use route definitions to specify the requested URL and corresponding controller method. Here is an example:

Route::get('/user/{id}', 'UserController@show');

In the above example, when the user requests /user/{id}, the show method of the UserController controller is called and the requested id is passed as a parameter to the method.

Controller middleware calls controller methods

Laravel provides middleware functionality that can perform some operations before or after the request reaches the controller method. Middleware can be used in a controller to call other controller methods. Here is an example:

class UserController extends Controller
{
    public function __construct()
    {
        $this->middleware('auth')->only(['edit', 'update']);
    }
    public function edit($id)
    {
        // 编辑用户信息
    }
    public function update(Request $request, $id)
    {
        // 更新用户信息
    }
}

In the above example, the edit and update methods of the UserController controller will only be called after being authenticated by the auth middleware.

Controller helper functions call controller methods

Laravel also provides some helper functions that can be used to call other controller methods between controller methods. The following are some commonly used auxiliary functions:

action function: the URL that can call the specified controller method. For example: action('UserController@show', ['id' => 1]).

redirect function: You can redirect the request to the specified controller method. For example: return redirect()->action('UserController@show', ['id' => 1]).

Controller dependency injection calls controller methods

In Laravel, you can use dependency injection to call controller methods. For example, the parameters of the request can be injected directly into the controller method. Here is an example:

class UserController extends Controller
{
    public function show(User $user)
    {
        // 显示用户信息
    }
}

In the above example, Laravel automatically parses the User model and passes the requested User instance to the show method.

Summary

The ways to call controller methods in Laravel include routing calls, middleware calls, auxiliary function calls and dependency injection calls. Depending on the specific needs and scenarios, you can choose the appropriate way to call the controller method.

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