MyPHP - All about PHP.

Is it always necessary to create objects from class? No. An object is necessary to be created if the base class has non-static methods. But if the class has static methods, then objects don’t need to be created. You can call the class method directly in this case, using the class name. How much memory does a class occupy? Classes do not consume any memory. They are just a blueprint based on which objects are created. Now when objects are created, they actually initialize the class members and methods and therefore consume memory. Can you create an instance of an abstract class? No. Instances of an abstract class cannot be created because it does not have a complete implementation. However, instances of subclass inheriting the abstract class can be created. What is a final variable? A variable whose value does not change. It always refers to the same object by the property of non-transversity. What are the differences between error and exception? Exception - Exception can be recovered b