Question 1

How to configure services in Symfony DependencyInjection?

Accepted Answer

Define services in PHP, YAML, or XML files with dependencies listed; use autowiring for automatic injection or manual wiring for precise control. The documentation provides examples for each format to streamline setup.

Question 2

Symfony DI vs Laravel service container: which is better?

Accepted Answer

Symfony DI is more flexible and feature-rich with compiler passes and multiple config formats, ideal for complex applications. Laravel's container is simpler and convention-based, better for rapid development in its ecosystem. Choose based on project needs and framework preference.

Question 3

Does Symfony DependencyInjection support lazy loading?

Accepted Answer

Yes, it supports lazy loading to defer service instantiation until needed, improving performance. Configure services with the 'lazy' option in definitions, as mentioned in the key features for optimization.

Question 4

What are service tags and how do I use them?

Accepted Answer

Service tags group services for batch processing, like applying compiler passes or common logic. Add tags in service configurations to enable functionalities such as event listeners or command registration in Symfony.

Question 5

Can I use Symfony DI without the Symfony framework?

Accepted Answer

Yes, it's a standalone component installable via Composer. Bootstrap the container independently, but note that some features, like integration with other Symfony components, might require additional setup.

Question 6

How to handle circular dependencies in Symfony DI?

Accepted Answer

Use setter injection or lazy services to break circular references; the container provides mechanisms like 'lazy' or proxy services to resolve these issues without runtime errors, though it requires careful configuration.

Symfony DI

What is Symfony DI?

Overview

Use Cases

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Pros & Cons

Pros

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Frequently Asked Questions