php-the-right-way/_posts/06-01-01-Dependency-Injection.md

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Dependency Injection	dependency_injection

Dependency Injection

From Wikipedia:

Dependency injection is a software design pattern that allows the removal of hard-coded dependencies and makes it possible to change them, whether at run-time or compile-time.

This quote makes the concept sound much more complicated than it actually is. Dependency Injection is providing a component with its dependencies either through constructor injection, method calls or the setting of properties. It is that simple.