What is the difference between abstract classes and interfaces in PHP? When would you use each?
- Abstract classes can have method implementations, while interfaces cannot. Abstract classes are useful when you want to provide a default implementation for some methods, while interfaces are suitable for implementing multiple inheritance.
- Abstract classes and interfaces both provide a way to achieve abstraction in PHP. Abstract classes are used when you want to create a blueprint for other classes to inherit from. Interfaces, on the other hand, define a contract that classes must adhere to.
- Abstract classes allow you to create objects, while interfaces cannot. Abstract classes are used when you want to create a contract that other classes must implement. Interfaces are used when you want to create a common set of methods that different classes can implement.
- Abstract classes and interfaces are functionally the same in PHP. The choice between them is purely based on personal preference.
Abstract classes in PHP can have method implementations, allowing you to define common behavior for its subclasses. Interfaces, on the other hand, only define method signatures that must be implemented by classes. Abstract classes are used when you want to create a base class that provides common functionality, while interfaces are used to define a contract that multiple classes can adhere to. Knowing when to use each depends on the specific requirements of your application. For more information, you can refer to the PHP documentation: http://php.net/manual/en/language.oop5.abstract.php, http://php.net/manual/en/language.oop5.interfaces.php
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