dependency injection with php

Dependency Injection with PHPNikita Groshin

Nguyễn Huy Tuấn

Itim

More than 200 employees More than 80 developers from different

countries Different programming languages and paradigm Java, C++, PHP, JS, Python etc

Frontend and Tools Deprtment

13 members PHP, JS, Python Kohana, Zend Framework 100% Zend Certificated developers

Core Products

Search engine http://coccoc.vn/ Browser http://corom.vn Not only

"Developers! Developers! Developers"

"Dependency! Dependency! Dependency"

Dependencies are suck?

NO. They are useful! Hard code is suck

Good Dependency

Bad Dependency

Bad

Better

Good

Dependency Injection are simple.

Bad

Good

Injection types

Constructor injection Setter injection Interface injection

Interface Injection

Interface injection

Quite easy.But why to use it?

Hard coded dependency

Hard to reuse Poor isolation Hard to test A lot of code Hard to maintain Hard to understand

Dependency injection

Loose coupling Reuse of code Reduce amount of code Clear and Understandable Extremely easy to test

Dependency injection

Loose coupling

Reuse of code

Reduce amount of code

Clear and Understandable

Extremely easy to test

Extremely easy to test

Manual Di management is complicated.

We need container!

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

How many lines of codewe need for simple

DI container?

Twittee

http://twittee.org/ Packed in less than 140 characters, it fits in a

tweet. Author Fabien Potencier Production ready

Twittee source

Pimple

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

Questions?

job.coccoc.vn nike-17@coccoc.vn