Speaker: Nikita Work at: CocCoc

1. Dependency Injection with PHP
Nikita Groshin
Nguyễn Huy Tuấn

2. Itim

More than 200 employees

More than 80 developers from different
countries

Different programming languages and
paradigm

Java, C++, PHP, JS, Python etc

3. Frontend and Tools Deprtment

13 members

PHP, JS, Python

Kohana, Zend Framework

100% Zend Certificated developers

4. Core Products

Search engine http://coccoc.vn/

Browser http://corom.vn

Not only

5. "Developers! Developers!
Developers"
"Dependency! Dependency!
Dependency"

6. Dependencies are suck?

NO. They are useful!

Hard code is suck

7. Good Dependency

8. Bad Dependency

9. Bad

10. Better

11. Good

12. Dependency Injection are simple.

13. Bad

14. Good

15. Injection types

Constructor injection

Setter injection

Interface injection

16. Interface Injection

17. Interface injection

18. Quite easy.
But why to use it?

19. Hard coded dependency

Hard to reuse

Poor isolation

Hard to test

A lot of code

Hard to maintain

Hard to understand

20. Dependency injection

Loose coupling

Reuse of code

Reduce amount of code

Clear and Understandable

Extremely easy to test

21. Dependency injection

Loose coupling

Reuse of code

Reduce amount of code

Clear and Understandable

Extremely easy to test

22. Extremely easy to test

23. Manual Di management is
complicated.

24. We need container!

25. Disclaimer

Dependency Injection != DI container

DI container use Service Locator Anti-Pattern

DI container make code 'less native'

Powerful tool – use careful

Often Manual injection is enough

26. How many lines of code
we need for simple
DI container?

27. Twittee

http://twittee.org/

Packed in less than 140 characters, it fits in a
tweet.

Author Fabien Potencier

Production ready

28. Twittee source

29. Pimple

http://pimple.sensiolabs.org/

50 lines of code

Full functionality

Author Fabien Potencier

Production ready

30. Questions?

job.coccoc.vn

nike-17@coccoc.vn