Laravel development: How to define routes using Laravel Routing?

Laravel Development: How to define routes using Laravel Routing?

When we create a Laravel application, defining routes is a necessary and basic step. Laravel Routing's elegance and convenience make defining routes an easy and enjoyable task.

Route is the application's URL mapping, which tells the application how to respond to requests from the client. Through beautiful routing design, we can achieve many functions, such as managing different pages and application functions, determining different ways to respond to requests, and passing parameters.

This article will introduce how to use Laravel Routing to define routes.

Laravel Routing Basics

In Laravel, route definition is usually implemented through routing files (route files). All routing definitions are completed in the route file, which is located in the routes folder of the project directory.

In Laravel, the common routing types are as follows:

• GET request
• POST request
• PUT request
• DELETE request

For each type of request, we can use the corresponding method to define routing. For example, if we want to define a route for a GET request, we can add the following code to the route file:

Route::get('/', function () {
    return view('welcome');
});

The Route::get() method in the code indicates that we want to define a route for a GET request, followed by The '/' represents the route URL. The route here points to an anonymous function, which returns a view.

When defining the route of a POST request, we can use the Route::post() method. The specific code is as follows:

Route::post('/user', function () {
    // 创建新用户
});

In this example, we create a new user through a POST request.

The route definitions for PUT requests and DELETE requests are also similar. We can use Route::put() and Route::delete() to define the routes for PUT requests and DELETE requests respectively.

Laravel Routing parameters

In Laravel, we can define some parameters to achieve more flexible routing. For example, we can define a route that accepts one parameter. The specific code is as follows:

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

This route points to an anonymous function. The function accepts a parameter $id, and the routing URL is /user/{id}. For example, when we access /user/1, the returned information is "User 1", indicating that the route has been successfully matched.

We can also define multiple parameters in the route. The specific code is as follows:

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

This route points to an anonymous function. The function accepts two parameters $id and $name. The routing URL is /user/{id}/{name}. For example, when we access /user/1/john, the returned information is "User 1 Name: john".

Laravel Routing named routing

In Laravel, we can name the route to make it easier to reference and jump. For example, we can name the previously defined route that accepts parameters. The specific code is as follows:

Route::get('/user/{id}', function ($id) {
    return 'User '.$id;
})->name('user.profile');

The ->name() method in this code is used to specify the route name. We name this route user.profile.

We can use the route() function to reference the named route. The specific code is as follows:

$url = route('user.profile', ['id' => 1]);

In this code, we use the route() function to generate a URL for the named route. We can pass the required parameters to the route() function as the second parameter.

When we call the route() function, Laravel will return a complete URL, for example: http://your-app-url/user/1. The 1 here is the parameter we passed to the route() function.

Laravel Routing middleware

In Laravel, we can filter routes through middleware. Middleware is a mechanism that performs some action before or after a request is passed to a Laravel application.

For example, we can add an authentication middleware to route requests to ensure that the user has been authenticated. The specific code is as follows:

Route::get('/dashboard', function () {
    //
})->middleware(['auth']);

The middleware(['auth']) method in this code is used to specify the middleware in the route. In the above example, we specify middleware as auth to ensure that the user has been authenticated before accessing the dashboard route.

We can add multiple middlewares by calling the middleware() method. The specific code is as follows:

Route::get('/dashboard', function () {
    //
})->middleware(['auth', 'admin']);

The middleware() method in this code specifies two middlewares: auth and admin . This means that the user must be authenticated and granted administrator privileges to access the dashboard route.

Conclusion

In Laravel development, it is crucial to understand how to define Routing. With Laravel Routing, we are able to define elegant and flexible URL key-value pairs for our applications and add various filters and middleware to requests.

In this article, we introduced the basics of Laravel Routing, parameters, named routes, and middleware. I hope this content is helpful when you use Laravel Routing to define routes.

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