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SitePoint PHP Blog:
Dependency Injection with Laravel's IoC
June 05, 2014 @ 11:51:08

The SitePoint PHP blog has a new tutorial posted showing you how to use the Laravel dependency injection container to handle dependencies in you Laravel-based applications. Younes Rafie introduces some of the basic concepts behind dependency injection and the various types to get everyone started on the same level.

As developers, we are always trying to find new ways to write well designed and clean code by adopting new styles, using design patterns, and trying new robust frameworks. In this article we will explore the dependency injection design pattern through Laravel's IoC component and see how it can improve our design.

He includes examples of the three basic types of injection - controller, setter and interface - with brief code examples of their implementation. He goes on to talk about the "Inversion of Control" principle (part of the SOLID set of principles) and how the Laravel dependency injection container helps by binding objects and instances for later retrieval. Code examples for session storage handling (through a MySQL database) are included that are automatically resolved as the class requires them.

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Link: http://www.sitepoint.com/dependency-injection-laravels-ioc

Reese Wilson:
Using the ServiceManager as an Inversion of Control Container (Part 1)
October 01, 2012 @ 08:04:02

The this recent post to his blog Reese Wilson looks at using one of the modules of the Zend Framework v2, the ServiceManager, as an inversion of control container in your app.

In Zend Framework 1, it was difficult to follow best practices when it came to writing testable code. Sure, you could make testable models, but once you need those models in a controller, what do you do? Zend Framework 2 makes it much easier. In this post, I'll cover the basics of injecting a model into a controller. The main goal here is to be able to wire up and configure your application from the highest level possible. Constructor injection + inversion of control makes it easy to determine which classes are dependent on other classes.

He creates a "Building" module and a "BuildingController" inside of it. This controller takes in an instance of a "Building" model as a dependency. He also shows how to define this dependency in the "getControllerConfig" method of your module to make it work automatically. He makes the "Building" model itself with no dependencies and sets it up as an "invokable" in that same "getControllerConfig" method.

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servicemanager zendframework2 inversionofcontrol ioc designpattern



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