How to use the routing function in the Laravel framework

How to use the routing function in the Laravel framework

Laravel is a popular PHP framework that provides many convenient functions, including powerful routing functions. In this article, we will learn how to use routing functionality in Laravel framework.

What is routing?

Routing refers to the mechanism that maps URL links to corresponding controller actions or closure functions. It allows us to define different pages or functions in the website and the corresponding processing logic.

In Laravel, we can define our routes in the web.php or api.php file in the routes directory. These files contain all the routing rules for our application.

Define a simple route

First, let's look at a simple example. In the web.php file, we can define a basic routing rule as follows:

Route::get('/hello', function () {
    return 'Hello, Laravel!';
});

The above code means that when we enter http:// in the browser your-domain.com/hello, the framework will call the closure function and return the Hello, Laravel! string.

Define routes with parameters

In addition to basic routing rules, we can also define routes with parameters. Parameters can be passed as part of the URL, or as a query string.

For example, we can define a route that accepts a user ID as a parameter as follows:

Route::get('/user/{id}', function ($id) {
    return 'User ID: '.$id;
});

The above code means that when we enter http://your -domain.com/user/1, the framework will call the closure function and return the User ID: 1 string.

Use controllers to handle routing

In Laravel, we usually place specific logic code in the controller. We can use controllers to handle routing.

First, we need to create a controller. We can use the following command to generate a new controller:

php artisan make:controller UserController

The above command will create a controller named UserController in the app/Http/Controllers directory document.

Next, let us define an example of using a controller to handle routing:

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

The above code means that when we enter http://your-domain in the browser. com/user/1, the framework will call the show method of the UserController controller to process the route.

In the UserController controller file, we can define the show method as follows:

namespace AppHttpControllers;

use AppUser;

class UserController extends Controller
{
    public function show($id) {
        $user = User::find($id);
        return view('user.show', ['user' => $user]);
    }
}

In the above code, we first use UserThe model class obtains user data from the database. Then, we pass the obtained user data to the view user.show and return the view.

Routing Group

Laravel also provides the function of routing group, allowing us to group and manage multiple related routes.

For example, we can put all routes that require authentication in a routing group:

Route::middleware('auth')->group(function () {
    Route::get('/dashboard', 'DashboardController@index');
    Route::get('/profile', 'ProfileController@show');
    // 其他需要身份验证的路由
});

The above code represents /dashboard and /profileRoutes all require authentication. We can use DashboardController and ProfileController to handle these routes.

Summary

This article details how to use the routing function in the Laravel framework. We learned how to define simple routing rules, how to define routes with parameters, and how to use controllers to handle routing. Additionally, we learned how to use route groups to manage multiple related routes. I hope this article will be helpful to you when using the routing functionality in the Laravel framework.

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