speaker nguyen huy tuan dependency injection in php

DEPENDENCY INJECTION with PHP

Nikita Groshin / Nguyễn Huy Tuấn

More than 200 employeesMore than 80 developers from different countriesDifferent programming languages and paradigmJava, C++, PHP, JS, Python etc

Cốc Cốc

13 membersPHP, JS, PythonKohana, Zend Framework100% Zend Certificated developers

Frontend and Tools Deprtment

Search engine http://coccoc.vnBrowser http://corom.vnNot only

Core Products

NO. They are USEFUL!Hard code is suck

Dependencies are suck?

Good Dependency

User_Model Article_Model

Dependency

Bad Dependency

User_Model Session

Dependency

Bad

Better

Good

Dependency Injection is bad

High LevelModule

Low LevelModule

Dependency

Good

High LevelModule

Low LevelModule

Abstraction

Constructor injectionSetter injectionInterface injection

Injection types

Interface Injection

Quite easy But why to use it?

Hard to reusePoor isolationHard to testA lot of codeHard to maintainHard to understand

Hard coded dependency

Loose couplingReuse of codeReduce amount of codeClear and UnderstandableExtremely easy to test

Dependency injection

Loose coupling

Reuse of code

Reduce amount of code

Clear and Understandable

Extremely easy to test

Dependency injection

Extremely easy to test

Manual Di management is complicated

We need container!

Disclaimer

Dependency Injection != DI containerDI container use Service Locator Anti-PatternDI container make code 'less native'Powerful tool – use carefulOften Manual injection is enough

How many lines of code we 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 codeFull functionality Author Fabien PotencierProduction ready

Questions?

job.coccoc.vnnike-17@coccoc.vntuannh@coccoc.vn