Difference between abstract class and interface php
IntroductionBefore diving deep into the difference between abstract class and interface, you must understand one basic thing: these are two completely different classes that cannot be used as an alternative to one another. Show Interface classes completely empty the shells while expecting child classes to implement everything for them. Abstract classes not only contain the common piece of information between the shells inside but also expect the child classes within to fill in the gaps. Let us dive in a bit deeper to actually understand the difference minutely. If you want to read about PHP Array questions then you can visit here. This will help you crack your PHP interviews. Interface ClassAs we already know, an interface is actually defined by an interface keyword where all the methods are abstract. In addition to this, all the methods declared in this type of class must be declared in public which reflects the true nature of an interface. Let's help to demonstrate that with an example:
As you can see above, in the interface, the method body is not defined. Only the name and the parameters are being defined. Now, let's move on to the abstract class. Abstract ClassIn PHP, an abstract class is one being partially implemented by any developer. It might contain at least one abstract method which is basically a method without any written code. It just contains the name and the parameters and has been marked as “abstract”. By definition, an abstract class is simply a function definition whose purpose is to serve the programmer by telling them the method in question must be implemented in a child class. Here is an example to demonstrate the abstract class:
Now that you have been acquainted with what is an abstract an interface class, its time to delve into their differences, step by step. Here’s a table depicting the difference between abstract and interface class in PHP.
ConclusionNow that you have learned abstract class and interface differences, it will be much easier to implement them on your project. Abstract class:
Interface:
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Help Others, Please ShareWhat is difference between abstract class and interface?Abstract Class Vs. Interface: Explore the Difference between Abstract Class and Interface in Java. The Abstract class and Interface both are used to have abstraction. An abstract class contains an abstract keyword on the declaration whereas an Interface is a sketch that is used to implement a class.
Is it better to use interface or abstract class?If you are creating functionality that will be useful across a wide range of objects, then you must use an interface. Abstract classes, at the end of the day, should be used for objects that are closely related. But the interfaces are best suited for providing common functionality to unrelated cases.
What is difference between inheritance and interface in PHP?Interface definition involves only constants. Conversely, While inheriting the class the members can be declared as constant and variable. An interface contains the abstract methods while inheriting classes contain code for each method. Access specifiers used in an interface can be only public.
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