Where is laravel backend controlled?

With the continuous development of Internet technology, more and more websites and applications use Laravel as the backend development framework. The Laravel framework provides many powerful features and tools that enable developers to easily build high-quality applications and provide users with a first-class experience. However, when using Laravel to build the backend, many developers may encounter some problems, such as how to control the backend in Laravel. This article will analyze in detail the control method of Laravel backend.

1. The basic components of Laravel’s mid- and back-end

Before starting to explain the control methods of Laravel’s mid- and back-end in detail, let’s first understand the basic components of Laravel’s mid- and back-end. The backend in Laravel usually consists of the following components:

1. Controller (Controller): Responsible for receiving requests and processing them to return response data.

2. Model: Responsible for database operations and encapsulates the logic implementation related to the database.

3. Route (Route): Specify the corresponding controller and method after the URL request comes in.

4. View (View): Render the data returned by the controller.

2. Route (Route) method of controlling the background in Laravel

In Laravel, routing (Route) is one of the core parts of controlling the background. Developers can use the router (Route) provided by Laravel to define background routing and specify the corresponding controller and method after the request comes in. In Laravel, there are two ways to define routes: one is controller-based routing, and the other is closure-based routing.

1. Controller-based routing

Controller-based routing refers to organizing code with a controller. The controller is one of the core parts of the application. It receives requests and returns responses. data. In Laravel, controllers can define routes through methods such as Route::get and Route::post.

//Create background route
Route::get('/admin/index',['as'=>'admin.index','uses'=>'AdminIndexController@index' ]);

This code defines that after the /admin/index request comes in, the request is processed through the index method in the AdminIndexController controller. Among them, the "as" parameter specifies the alias of the route, and the "uses" parameter specifies the controller and method specified by the route.

2. Closure-based routing

Closure-based routing refers to using anonymous functions to directly process routing requests. In Laravel, through the sample code, you can see that the only difference from controller-based routing is that there is no "uses" parameter, but an anonymous function is used to directly handle routing requests:

//Create background routing
Route::get('/admin/index', function () {

return view('admin.index');

});

This code defines that after the /admin/index request comes in, it passes the anonymous function The form handles the request directly. This method is simpler than controller-based routing, but the decoupling without a controller is worse, so you need to weigh the pros and cons when using it.

3. How the controller (Controller) controls the backend in Laravel

In addition to routing (Route), another core component in Laravel is the controller (Controller). The controller is responsible for processing routing requests and returning response data. In Laravel, routing with controllers is usually implemented using controller-based routing.

General steps for using the controller:

1. Create the controller

To create the controller, you need to use the php artisan command line tool, enter the following in the terminal Code to create a controller:

php artisan make:controller ControllerName

The ControllerName here refers to the name of the controller. For example, to create a controller named AdminController you should enter the following code:

php artisan make:controller AdminController

After the controller is created, you can find it in the app/Http/Controllers directory .

2. Define routing

Controller-based routing is defined using Route::get, Route::post and other methods. This is similar to the method mentioned above. .

Route::get('/admin/index', ['as' => 'admin.index', 'uses' =>'AdminController@index']);

3. Implement controller methods

The methods implemented by the controller need to ensure that the requests defined by the route can be satisfied. The following is the simplest controller method:

public function index()
{
    return view('admin.index');
}

This function receives requests from the /admin/index route and returns the admin.index view file.

4. Conclusion

In short, there are two main ways to control the backend in Laravel: one is routing-based control, and the other is controller-based control. We can choose different control methods based on the size, complexity and personal preferences of the project.

In short, no matter which method is used to control the Laravel backend, you need to be proficient in relevant technologies and knowledge, and always maintain a high degree of control over code quality and focus on users.

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