Shulou(Shulou.com)06/03 Report--

This article mainly introduces "some advanced object-oriented programming features of PHP". In daily operation, I believe that many people have doubts about some advanced object-oriented programming of PHP. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts of "some advanced object-oriented programming features of PHP". Next, please follow the editor to study!

In general, learning PHP requires some of the following features:

Object cloning. One of the main improvements to the OOP model in PHP5 is that all objects are treated as references rather than values. But if all objects are treated as references, how do you create a copy of the object? The answer is by cloning objects.

Inherit. As mentioned earlier, building a class hierarchy through inheritance is a key concept of OOP.

Class Employee {...} class Executive extends Employee {...} class CEO extends Executive {...}

Interface. An interface is a collection of unimplemented method definitions and constants, which is equivalent to a class blueprint. The interface only defines what the class can do, not the details of the implementation. This chapter introduces PHP5's support for interfaces and provides some examples to demonstrate this powerful OOP feature.

Abstract class. Abstract classes are essentially classes that cannot be instantiated. Abstract classes will be inherited by instantiable classes, which are called concrete classes (concreate class). Abstract classes can be fully implemented, partially implemented, or not implemented at all.

Abstract class Class_name {/ / insert attribute definitions here / / insert method definitions here}

Namespace. Namespaces can be divided into various libraries and classes according to the context, helping you to manage the code base more effectively.

If you have used other object-oriented languages, you may wonder why the above features do not include some OOP features that are familiar to other languages. The reason is simple: PHP does not support these features. To make sure you're no longer confused, here's a list of advanced OOP features that PHP doesn't support.

Method overload. PHP does not support polymorphism through function overloading, and probably never will, according to the discussion on the Zend website. To find out exactly why, check out http://www.zend.com/php/ask_experts.php

Operator overloading. It is not currently supported to give new meaning to operators based on the type of data being modified. According to the discussion on the zend website, it is unlikely that this feature will be implemented in the future.

Multiple inheritance. PHP does not support multiple inheritance. However, multiple interfaces are supported.

At this point, the study on "some advanced object-oriented programming features of PHP" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.