hyperf/docs/en/quick-start/overview.md

QuickStart

As an example of how to use Hyperf, this page will create an HTTP Server to implement a simple Web Service by defining routes and controllers. Hyperf can do much more, but features like service governance, gRPC services, annotations programming, AOP, and other features will be explained in specific chapters.

Defining a route

Hyperf uses nikic/fast-route as the default routing component, so you can easily define your routes in config/routes.php. Hyperf also provides an extremely powerful and convenient Annotation Routing feature.

For more information on routing outside of the examples shown below, please refer to the Router chapter.

Define routes via file configuration

The routes file is located in config/routes.php in the hyperf-skeleton project. Below are some common usage examples:

<?php
use Hyperf\HttpServer\Router\Router;

// The code example here provides three different binding definitions for each example. In practice, you only need to define one of them.

// Set the route for a GET request, bind the access address '/get' to App\Controller\IndexController::get()
Router::get('/get', 'App\Controller\IndexController::get');
Router::get('/get', 'App\Controller\IndexController@get');
Router::get('/get', [\App\Controller\IndexController::class, 'get']);

// Set the route for a POST request, bind the access address '/post' to App\Controller\IndexController::post()
Router::post('/post', 'App\Controller\IndexController::post');
Router::post('/post', 'App\Controller\IndexController@post');
Router::post('/post', [\App\Controller\IndexController::class, 'post']);

// Set a route that allows GET, POST, and HEAD requests, bind the access address '/multi' to App\Controller\IndexController::multi()
Router::addRoute(['GET', 'POST', 'HEAD'], '/multi', 'App\Controller\IndexController::multi');
Router::addRoute(['GET', 'POST', 'HEAD'], '/multi', 'App\Controller\IndexController@multi');
Router::addRoute(['GET', 'POST', 'HEAD'], '/multi', [\App\Controller\IndexController::class, 'multi']);

Define routes via annotations

Hyperf provides an Annotations feature which makes it fast and easy to define routes. Hyperf provides @Controller and @AutoController annotations for use in a Controller class. For in-depth instructions, please refer to the Routing chapter. Here are some quick examples:

Define routes via @AutoController

@AutoController provides automatic routing bindings for most simple routing scenarios. When using @AutoController, Hyperf will automatically parse all public methods of the class and provide GET and POST requests for each of those methods.

@AutoController annotations require the namespace use Hyperf\HttpServer\Annotation\AutoController;

<?php
declare(strict_types=1);

namespace App\Controller;

use Hyperf\HttpServer\Contract\RequestInterface;
use Hyperf\HttpServer\Annotation\AutoController;

/**
 * @AutoController()
 */
class IndexController
{
    // Hyperf will automatically generate a `/index/index` route for this method, allowing GET or POST requests
    public function index(RequestInterface $request)
    {
        // Retrieve the id parameter from the request
        $id = $request->input('id', 1);
        return (string)$id;
    }
}

Define routes via @Controller

For more flexible routing definitions, @Controller can be used instead of @AutoController. Using a @Controller annotation in a class makes it a Controller class, and the @RequestMapping annotation can be used to define the request methods and paths.

Hyperf also provides a variety of quick and convenient Mapping annotations, such as @GetMapping, @PostMapping, @PutMapping, @PatchMapping, @DeleteMapping, which can replace @RequestMapping to save you time when a route only needs a single HTTP method.

@Controller annotations require the namespace use Hyperf\HttpServer\Annotation\Controller; @RequestMapping annotations require the namespace use Hyperf\HttpServer\Annotation\RequestMapping; @GetMapping annotations require the namespace use Hyperf\HttpServer\Annotation\GetMapping;
@PostMapping annotations require the namespace use Hyperf\HttpServer\Annotation\PostMapping; @PutMapping annotations require the namespace use Hyperf\HttpServer\Annotation\PutMapping;
@PatchMapping annotations require the namespace use Hyperf\HttpServer\Annotation\PatchMapping; @DeleteMapping annotations require the namespace use Hyperf\HttpServer\Annotation\DeleteMapping;

<?php
declare(strict_types=1);

namespace App\Controller;

use Hyperf\HttpServer\Contract\RequestInterface;
use Hyperf\HttpServer\Annotation\Controller;
use Hyperf\HttpServer\Annotation\RequestMapping;

/**
 * @Controller()
 */
class IndexController
{
    // Hyperf will automatically generate a `/index/index` route for this method, allowing GET or POST requests
    /**
     * @RequestMapping(path="index", methods="get,post")
     */
    public function index(RequestInterface $request)
    {
        // Retrieve the id parameter from the request
        $id = $request->input('id', 1);
        return (string)$id;
    }
}

Handle HTTP Requests

Hyperf is unopinionated. There is no requirement for you to implement HTTP request processing using any specific format. You can use the traditional MVC mode or the RequestHandler mode to handle requests. Let's take MVC mode as an example:

Create a Controller folder in the app folder and create a IndexController.php file. The index method gets the id parameter from the request, converts it to a string type and returns it to the client.

<?php
declare(strict_types=1);

namespace App\Controller;

use Hyperf\HttpServer\Contract\RequestInterface;
use Hyperf\HttpServer\Annotation\AutoController;

/**
 * @AutoController()
 */
class IndexController
{
    // Hyperf will automatically generate a `/index/index` route for this method, allowing GET or POST requests
    public function index(RequestInterface $request)
    {
        // Retrieve the id parameter from the request
        $id = $request->input('id', 1);
        // Transfer $id parameter to a string, and return $id to the client with Content-Type:plain/text
        return (string)$id;
    }
}

Dependency Auto-Injection

Dependency injection is a very powerful feature provided by Hyperf and is the foundation for the flexibility of the framework.

Hyperf provides two methods of injection, one is through constructor injection, the other is through the @Inject annotation injection, below are examples for both methods:

Suppose we have an \App\Service\UserService class. There is a getInfoById(int $id) method in the class that takes an id argument and returns a user entity. The return type and internals aren't relevant to this documentation, so we won't pay them too much attention, what we want is to get UserService in our class and to use the methods of that class. The normal method is to instantiate the UserService class through new UserService(), but in Hyperf using dependency injection, we have a better solution.

Injection via constructor

Declare the parameter type within the constructor's arguments, and Hyperf will automatically inject the corresponding object or value.

<?php
declare(strict_types=1);

namespace App\Controller;

use Hyperf\HttpServer\Contract\RequestInterface;
use Hyperf\HttpServer\Annotation\AutoController;
use App\Service\UserService;

/**
 * @AutoController()
 */
class IndexController
{
    /**
     * @var UserService
     */
    private $userService;
    
    // Declare the parameter type within the constructor's arguments, and Hyperf will automatically inject the corresponding object or value.
    public function __construct(UserService $userService)
    {
        $this->userService = $userService;
    }
    
    // /index/info
    public function info(RequestInterface $request)
    {
        $id = $request->input('id', 1);
        return $this->userService->getInfoById((int)$id);
    }
}

Injection via @Inject annotation

Declare the parameter type above the corresponding class property via @var and use the @Inject annotation. Hyperf will automatically inject the corresponding object or value.

@Inject annotations require the namespace use Hyperf\Di\Annotation\Inject;

<?php
declare(strict_types=1);

namespace App\Controller;

use Hyperf\HttpServer\Contract\RequestInterface;
use Hyperf\HttpServer\Annotation\AutoController;
use Hyperf\Di\Annotation\Inject;
use App\Service\UserService;

/**
 * @AutoController()
 */
class IndexController
{
    /**
     * @Inject()
     * @var UserService
     */
    private $userService;
    
    // /index/info
    public function info(RequestInterface $request)
    {
        $id = $request->input('id', 1);
        return $this->userService->getInfoById((int)$id);
    }
}

In the above example, we can easily see that $userService is not instantiated manually, but the class object corresponding to the property is automatically injected by Hyperf.

However, this case does not really show the real power of dependency injection. We assume that UserService has its own depencencies, and that those dependencies have many other dependencies as well, so that any class you define needs to instantiate many objects manually and manage the order of each class's arguments. In Hyperf, we don't need to manually manage these dependencies, just declare the class name of the arguments we need, and Hyperf does all the work for us.

When UserService needs to undergo a drastic internal change such as replacing a local service with an RPC remote service, we only needs to adjust the class definition of UserService.php to replace the old service with the new RPC service in a single file.

Start the server

Since Hyperf has a built-in coroutine server, Hyperf will run as a CLI process. After defining our routes and writing the application logic code, we can start the server by entering the root directory of the project and executing the command php bin/hyperf.php start.

When the console shows that the server has started, you can access the server through cURL or via the browser. By default, the url of the above dependency injection examples is http://127.0.0.1:9501/index/info?id= 1.

Reload the code

Hyperf is a persistent CLI application. Once the process starts, the parsed PHP code will remain unchanged while the process is running, so changes to the PHP code after the server starts will have no effect. If you want the server to reload your code, you need to terminate the process by typing CTRL + C in the console and then re-execute the command php bin/hyperf.php start.

Tip: You can also configure the commands to manage the Server in your IDE, and you can quickly execute the Start the Server or Reload the code operations directly via the IDE's Start/Stop buttons.