How to use Hyperf framework for data paging

How to use the Hyperf framework for data paging

Introduction:
Data paging is very common in actual Web development. Paging allows users to browse large amounts of data. More convenient. Hyperf is a high-performance PHP framework that provides a powerful set of features and components. This article will introduce how to use the Hyperf framework for data paging and give detailed code examples.

1. Preparation:
Before you start, you need to ensure that the Hyperf framework has been installed and configured correctly. You can install it through Composer and then run the startup command of the Hyperf framework.

2. Database preparation:
In order to perform data paging, we first need to prepare a database table. Suppose our table is named users and contains the following fields: id, name, age.

3. Create a controller:
In the Hyperf framework, the controller is responsible for processing requests and returning responses. We first create a controller to handle the data paging functionality. You can quickly create a controller file by running the following command: php bin/hyperf.php gen:controller User

4. Data paging logic:
Open the controller file just generated app/Controller/UserController.php, where we can write the logic of data paging. The code example is as follows:

namespace AppController;

use HyperfDbConnectionDb;

class UserController extends AbstractController
{
    public function index()
    {
        $currentPage = $this->request->input('page', 1);  // 当前页码，默认为第一页
        $perPage = $this->request->input('perPage', 10);  // 每页显示的数据条数，默认为10条

        $total = Db::table('users')->count();  // 获取总数据条数

        $data = Db::table('users')->forPage($currentPage, $perPage)->get();  // 获取当前页的数据

        $response = [
            'total' => $total,
            'perPage' => $perPage,
            'currentPage' => $currentPage,
            'data' => $data,
        ];

        return $this->response->json($response);  // 返回JSON格式的响应
    }
}

In the above code, we obtain the current page number and the number of data items displayed on each page from the request. Then query the database through the DB component of the Hyperf framework to obtain the total number of data items and the data of the current page. Finally, the data is encapsulated into an array and a response in JSON format is returned.

5. Routing configuration:
In order to access the controller method we just created, routing configuration is also required. Add the following code in the config/routes.php file:

use AppControllerUserController;

// 绑定路由
Router::addGroup('/user', function () {
    Router::get('/index', [UserController::class, 'index']);
});

In the above code, we bind the /user/index route to UserController Controller's index method.

6. Testing and use:
Through the above steps, we have created the data paging function. You can get the results of the first page and each page showing 5 pieces of data by visiting http://yourdomain/user/index?page=1&perPage=5. You can adjust the page and perPage parameters as needed to obtain data with different page numbers and displayed numbers.

7. Summary:
The Hyperf framework provides simple and powerful database query and paging functions, which can easily implement data paging. This article introduces how to use the Hyperf framework for data paging and gives specific code examples. By learning and mastering these contents, I believe you can easily apply the data paging function in actual application development.

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