0049-laravel-interfaces-and-di

What problem does it solve?

Tight coupling between classes makes Laravel applications harder to test, harder to modify, and riskier to extend as requirements change.

Core Features & Use Cases

• Narrow contracts with interfaces: Define small interfaces (e.g., a Slugger) so consumers depend on behavior instead of concrete classes.
• Dependency injection for consumers: Inject the interface where it’s needed to keep code flexible and readable.
• Container binding for implementations: Bind a concrete implementation (e.g., AsciiSlugger) in a service provider so the container resolves the right class.

Use case: You need slug generation that may vary by locale or rules, so you can swap implementations without changing controllers, jobs, or other consumers.

Quick Start

Ask the AI to show how to define a Slugger interface, implement AsciiSlugger, and bind Slugger to AsciiSlugger in a Laravel service provider.