Symfony Code Challenges & Tips

1. Write a Symfony console command that fetches data from an external API and saves it to the database.

2. Implement a custom Symfony form type that dynamically populates a select field based on another field's value.

3. Create a doctrine event listener that automatically timestamps the created and updated fields on an entity.

4. Write a custom validation constraint in Symfony that checks if a string contains only alphanumeric characters.

5. Develop a service in Symfony that caches expensive database queries and serves cached results when possible.

6. Write a middleware that logs all incoming requests and their response times in a Symfony application.

7. Implement a simple file upload feature in Symfony that validates the file type and size before saving it to the server.

8. Create a twig extension that provides a custom filter to format date strings in a specified time zone.

9. Write a Doctrine query to retrieve the top 10 users with the most posts, leveraging DQL and ensuring proper joins.

10. Implement rate limiting for an API endpoint in your Symfony application using a custom service.