Symfony 4 Workshop

Starting a project

Open this website in your browser: http://symfony4.limenius.com/.

The slides for the sections of theory are available at https://www.slideshare.net/nachomartin/symfony-4-workshop-limenius.

Theory

What are Symfony 4 and Symfony Flex about.

Let's create a Symfony project with Flex.

Flex is the new way to start projects in Symfony 4. Let's use it to create a new project.

composer create-project symfony/skeleton sf4workshop

cd sf4workshop

Let's write a controller

Fire up your favorite editor and create a new file in src/Controller/DefaultController.php.

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<?php

namespace App\Controller;

use Symfony\Component\HttpFoundation\Response;

class DefaultController
{
    public function index()
    {
        return new Response('<html><body>Hi there!</body></html>');
    }
}

Also, uncomment these lines in config/routes.yaml

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index:
    path: /
    controller: App\Controller\DefaultController::index

Tip

Make sure that you are editing config/routes.yml and not config/packages/routing.yml. It is easy to make that mistake!

Now we are ready to see our first page.

For convenience, we will install the WebServer Bundle, instead of configuring Apache or Nginx.

composer req webserver

Now run:

bin/console server:run

And visit with your browser http://localhost:8000.

We should see our first page.

If you see an error about permissions, Symfony needs to be able to write into the /var/cache directory. This is typically fixed after installation when you run bin/console cache:clear