Symfony Cheat Sheet

Here’s a cheat sheet for Symfony, a PHP web application framework:

Symfony Project Structure

/src: Contains the source code of your application.
/config: Configuration files for the application.
/var: Temporary and log files.
/templates: Twig templates for rendering views.
/public: Web server’s document root.

Routing

Define Route in Controller:

/**
 * @Route("/hello/{name}", name="hello")
 */
public function hello($name)
{
    // Controller logic
}

Generate URL in Twig:

<a href="{{ path('hello', {'name': 'John'}) }}">Hello John</a>

Controllers

Rendering a View:

return $this->render('template.html.twig', ['variable' => $value]);

Redirecting:

return $this->redirectToRoute('route_name');

Forms

Create a Form Type:

// src/Form/TaskType.php
class TaskType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder->add('task', TextType::class)->add('dueDate', DateType::class);
    }
}

Handle Form Submission in Controller:

public function new(Request $request)
{
    $task = new Task();
    $form = $this->createForm(TaskType::class, $task);

    $form->handleRequest($request);

    if ($form->isSubmitted() && $form->isValid()) {
        // Process form submission
    }
}

Doctrine ORM

Entity Definition:

// src/Entity/Task.php
class Task
{
    /**
     * @ORM\Id
     * @ORM\GeneratedValue
     * @ORM\Column(type="integer")
     */
    private $id;

    /**
     * @ORM\Column(type="string")
     */
    private $task;

    // Getters and setters
}

Database Migrations:

php bin/console make:migration
php bin/console doctrine:migrations:migrate

Security

Firewall Configuration:

# config/packages/security.yaml
security:
    firewalls:
        secured_area:
            pattern: ^/admin
            http_basic:
                realm: "Secured Demo Area"

Roles and Access Control:

# config/packages/security.yaml
security:
    access_control:
        - { path: ^/admin, roles: ROLE_ADMIN }

Services and Dependency Injection

Define a Service:

# config/services.yaml
services:
    app.my_service:
        class: App\Service\MyService

Inject Service into Controller:

public function someAction(MyService $myService)
{
    // Use the service
}

Commands

Create a Command:

php bin/console make:command

Run Command:

php bin/console my:command

Twig Templating

Render a Variable:

{{ variable }}

Conditionals:

{% if condition %}
    {# Do something #}
{% endif %}

Symfony Console

Create a Command:

php bin/console make:command

Run Command:

php bin/console my:command

This Symfony cheat sheet provides a quick overview of some common tasks. Symfony has extensive documentation available, so refer to the Symfony Documentation for more in-depth information.