How to use Symfony8 framework in php?
As the needs of modern applications become more and more complex, using frameworks to develop applications has become an inevitable trend. Symfony is a widely recognized PHP framework designed for building high-quality web applications. Symfony 8 is the latest version of the Symfony framework, which offers many new features and enhancements. In this article, we will take a deep dive into how to use the Symfony 8 framework.
1. Install Symfony 8
Before you start using Symfony 8, you need to install PHP, Composer and Symfony 8 on your local computer. After installing Composer on your local machine, you can open the command line interface and run the following command to install Symfony 8:
composer create-project symfony/website-skeleton my_project_name
This command will download Symfony 8 from the Composer repository and install it in your project file Clamped. Once the installation is complete, you can start Symfony 8’s built-in web server by running the following command in your project folder:
cd my_project_name symfony server:start
Now you can view Symfony 8’s by typing http://localhost:8000 in your browser Welcome page.
2. Create a controller
In Symfony 8, you can use controllers to handle routing and requests. A controller is a simple PHP class that receives requests from the user and sends them to the appropriate function. Next, we'll create a presentation controller.
- First, create a new file called DemoController.php in the src/Controller folder. Then, enter the following code in the file:
namespace AppController;
use SymfonyComponentHttpFoundationResponse;
use SymfonyComponentRoutingAnnotationRoute;
class DemoController
{
/**
* @Route("/demo")
*/
public function index()
{
return new Response('Hello, World!');
}
}In this controller, we use Symfony 8's annotation routing mechanism to point the route to the /demo path and return the 'text/plain' response Returns 'Hello, World!'.
- Next, open the routes.yaml file in the configuration folder and add the following content:
# config/routes.yaml
demo:
path: /demo
controller: AppControllerDemoController::indexIn this configuration, we map the route to /demo path, and use the index method of DemoController as the route processor.
- Finally, start Symfony 8’s built-in web server and enter http://localhost:8000/demo in your browser. You should see a "Hello, World!" message in your browser.
3. Use Twig template engine
Twig is the default template engine in the Symfony 8 framework. It is an advanced template engine that provides many useful features and tools such as template inheritance and layout. Next, we will learn how to use the Twig template engine in a Symfony 8 application.
- First, create a new file named twig.yaml in config/packages and add the following configuration:
# config/packages/twig.yaml
twig:
default_path: '%kernel.project_dir%/templates'In this configuration, we specify The default path to the template directory.
- Next, create a new file called base.html.twig in the templates folder and add the following code:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
{% block title %}
<title>{% endblock %}</title>
{% endblock %}
</head>
<body>
{% block body %}
{% endblock %}
</body>
</html>In this code, We use Twig’s block functionality to define the title and content of the template.
- Now, create a new file called demo.html.twig in the templates folder and add the following code:
{% extends 'base.html.twig' %}
{% block title %}Demo Page{% endblock %}
{% block body %}
<h1>Hello, World!</h1>
{% endblock %}In this code, we The base.html.twig template is extended and the title and page content are defined.
- Finally, update the DemoController class to use the Twig template engine to render the demo.html.twig template. Add the following code:
namespace AppController;
use SymfonyBundleFrameworkBundleControllerAbstractController;
use SymfonyComponentHttpFoundationResponse;
use SymfonyComponentRoutingAnnotationRoute;
class DemoController extends AbstractController
{
/**
* @Route("/demo")
*/
public function index()
{
return $this->render('demo.html.twig', [
'message' => 'Hello, World!',
]);
}
}In this code, we use the render method to render the demo.html.twig template and use the message parameter to pass the message into the template.
- Start Symfony 8’s built-in web server again and enter http://localhost:8000/demo in the browser. You should see a more beautiful and interactive "Hello, World!" page in your browser.
To sum up, Symfony is a powerful PHP framework with extensive community support and extensive documentation. In Symfony 8, many new features and enhancements help you develop high-quality web applications with ease. Using the Twig template engine can help you create more beautiful and interactive pages. Now you know how to use the Symfony 8 framework!
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