Explain the concept of dependency injection in PHP. How does it promote loose coupling and better testability?
- Dependency injection is a design pattern in PHP where dependencies of a class are provided from outside rather than being created within the class itself. This promotes loose coupling, as the class no longer needs to know how to create its dependencies. It also improves testability, as dependencies can be easily mocked or replaced during testing.
- Dependency injection in PHP is a way to inject external dependencies into a class. This promotes tight coupling between classes, as they become dependent on each other. Dependency injection improves testability by making it easier to isolate dependencies during unit testing.
- Dependency injection is a technique in PHP where a class is injected into another class as a dependency. This promotes tight coupling between classes, as they become dependent on each other. Dependency injection improves testability by making it easier to test a class in isolation.
- Dependency injection is not supported in PHP.
Dependency injection is a powerful technique in PHP that improves code maintainability and testability. It allows you to inject dependencies into a class from the outside, making the class more modular and decoupled from its dependencies. This promotes loose coupling and makes it easier to replace or mock dependencies during testing. The concept of dependency injection involves passing dependencies to a class through constructor injection or setter injection. For more information, you can refer to the PHP documentation: http://php.net/manual/en/language.oop5.decon.php
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