How to use Symfony framework in php?-PHP Tutorial-php.cn

How to use Symfony framework in php?

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Release： 2023-06-02 14:12:01

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PHP is one of the mainstream technologies in Internet development now, and the Symfony framework is a PHP-based Web application framework that can help developers build high-quality, maintainable Web applications. Let's talk about how to use the Symfony framework.

1. Introduction to Symfony framework

Symfony is an open source PHP framework founded by Fabien Potencier. Symfony is based on MVC and provides many out-of-the-box components to help developers build web applications. The Symfony framework is based on open source software, which means it is free to use and can be customized by developers to suit the specific requirements of the application.

2. Characteristics of the Symfony framework

1. Provides a set of powerful ready-made components, allowing developers to quickly build high-quality, maintainable Web applications.

2. Follow the MVC pattern to make application implementation simpler and easier to manage.

3. Built-in many powerful tools and libraries, such as database abstraction layer, form operations, form validation, etc.

4. Provides a highly configurable template engine so that developers can easily perform front-end development.

3. Installation and configuration of the Symfony framework

Install the Symfony framework:

You can use Composer to install, the command is as follows:

composer create-project symfony/website-skeleton my_project_name

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You can also download the source code directly from GitHub and install it, but you need to manually install all dependencies and manually configure some configuration items.

Configuring the Symfony framework:

The configuration file is located in the config/packages directory. Some commonly used configuration files are as follows:

config/packages/framework.yaml: The global configuration of the application, you can configure everything from Session to routing.
config/packages/twig.yaml: The global configuration of the Twig template engine, you can configure all global Twig options, and you can also use it to configure the directory of template files.
config/packages/security.yaml: Security configuration, used to configure authentication and authorization methods.

4. Use of Symfony framework

Create a controller

Create it in the src/Controller directory A new controller class. This class should inherit the controller base class from the Symfony framework and have an execute method:

<?php
namespace AppController;

use SymfonyComponentHttpFoundationResponse;
use SymfonyComponentRoutingAnnotationRoute;
use SymfonyBundleFrameworkBundleControllerAbstractController;

class HelloController extends AbstractController
{
  /**
   * @Route("/")
   */
  public function index()
  {
    return new Response('<html><body>Hello World!</body></html>');
  }
}

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Create a route

Symfony framework uses annotation routing, so we need Add a route in the controller. Annotation routing is a way to add routes to controller methods.

  /**
   * @Route("/")
   */
  public function index()
  {
    return new Response('<html><body>Hello World!</body></html>');
  }

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Run the application

We can use the built-in web server to run the Symfony application:

php bin/console server:run

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So that we can access it in the browser "http://localhost:8000" to view our application.

4. Summary

The Symfony framework is a very powerful PHP framework. It has a ready-made component library, rigorous MVC pattern, and powerful tools and libraries. With Symfony, developers can quickly build high-quality, maintainable web applications, helping to improve development efficiency and reduce development costs.

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