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Christopher Bledsoe's Blog:
PHP Dependency Injection (Inversion of Control)
January 10, 2011 @ 09:39:03

On his ClickMagnate site Christopher Bledsoe has an interesting post looking at dependency injection (or, as he calls it "inversion of control") in PHP applications.

.NET and Java have some great IoC (Inversion of Control) containers but PHP hasn't gotten the same kind of dependency love (I know there are a few people who have tried to tackle this problem but I wanted something that worked with Zend Framework - my framework of choice). I also wanted the dependencies to be defined via the application.ini that Zend Framework uses... So, here's my attempt at that.

He includes both the configuration (Zend Framework based) of his dependency injection (DI) class that lists the classes each instance needs to have injected and the code for the actual DI class. The process looks at the configuration file and, if it finds something with the current class name, creates an instance of the class to inject and push it into the controller.

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