What is it?
Dependency Injection passes dependencies to a class rather than having it create them. IoC containers automate resolution.
Why does it matter?
DI is the most important pattern for testable, maintainable PHP. Every modern framework uses a DI container.
Learn DI, interfaces, and how Laravel service container works.
Real-World Use Cases
- 💡 Use case - Practical.
- ⚡ Performance - Critical.
- 🏢 Professional - Industry.
- 📚 Learning - Essential.
Core
# PHP Dependency Injection and Service Containers
# Learn DI, interfaces, and how Laravel service container works.Example
# ExampleBest Practice
# Best practicesQ: DI vs service locator?
DI: dependencies pushed into class — explicit, testable. Service locator: class pulls from global container — hidden dependencies, harder to test.
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