Detailed introduction to surfaces

1. Three-dimensional surface object PHP three major characteristics of object-oriented learning to fully understand abstraction, encapsulation, inheritance, polymorphism

Introduction: Three-dimensional surface Object: three-dimensional surface object. The three major characteristics of object-oriented PHP. Learn to fully understand abstraction, encapsulation, inheritance, and polymorphism: the three major characteristics of object-oriented object: encapsulation, inheritance, and polymorphism. First, briefly understand abstraction: we are in front When defining a class, it actually extracts the common attributes and behaviors of a class of things to form a physical model (template). This method of studying problems is called abstraction. Encapsulation Encapsulation is to combine the extracted data with The operations on data are encapsulated together, and the data is protected internally. Only authorized operations (methods) in other parts of the program can operate on the data. PHP provides three access control modifiers: public, which represents the global situation. Within this class, the class

2. Three-dimensional surface object PHP object-oriented guide (9) Access types

Introduction: Three-dimensional surface object: Three-dimensional surface object PHP object-oriented guide (9) Access type: 13. Access type The access modifier allows developers to access class members Restriction is a new feature of PHP5, but it is a good feature of the OOP language. And most OOP languages ​​already support this feature. PHP5 supports the following three access modifiers: public (public, default), private (private) and protected (protected). public public modifier, members in the class will have no access restrictions, all external members can access (read and write) this class becomes

3. Three-dimensional surface object PHP Object-oriented development introductory tutorial

Introduction: Three-dimensional surface object: Three-dimensional surface object PHP development introductory tutorial object-oriented: PHP is a scripting language with weak variables, which means that you This is flexible without having to define it first. A lot of freedom can also be given, but freedom is not a good thing for a program. Because it brings a lot of trouble for post-maintenance personnel to read. Let’s enter our first program: 1.php/////////////////////

4. Photoshop path tool draws the LOGO icon of the four-quarter ring on the surface

Introduction: This tutorial is to introduce to my friends how to use the Photoshop path tool to draw a LOGO icon of a curved four-quarter ring. The tutorial introduces it in detail and is worth learning. I recommend it to friends who like it. Come and learn, I hope it can be helpful to everyone

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