Backend Development
PHP Tutorial
PHP interface multiple inheritance and tarits method to achieve multiple inheritance effect tutorial details
PHP interface multiple inheritance and tarits method to achieve multiple inheritance effect tutorial details
The example of this article describes the method of multiple inheritance of PHP interface and tarits to achieve the effect of multiple inheritance. Share it with everyone for your reference, the details are as follows:
Multiple inheritance of interfaces
In PHP's object-oriented interface, interfaces can inherit interfaces. PHP classes can only inherit from one parent class (single inheritance), but interfaces can implement multiple inheritance and can inherit one or more interfaces. Of course, interface inheritance uses the extends keyword just like class inheritance. If you want multiple inheritances, just separate the inherited interfaces with commas.
It should be noted that when your interface inherits other interfaces, it directly inherits the static constant attributes and abstract methods of the parent interface, so the class must implement all relevant abstract methods when implementing the interface.
The following are examples:
1. Inherit a single interface
i
nterface testA{
function echostr();
}
interface testB extends testA{
function dancing($name);
}
class testC implements testB{
function echostr(){
echo "接口继承，要实现所有相关抽象方法!";
echo "
";
}
function dancing($name){
echo $name."正在跳舞!";
}
}
$demo=new testC();
$demo->echostr();
$demo->dancing("模特");
//运行结果
/**
接口继承，要实现所有相关抽象方法
模特正在跳舞!
**/2. Inherit multiple interfaces
interface testA{
function echostr();
}
interface testB{
function dancing($name);
}
interface testC extends testA,testB{
function singing($nickname);
}
class testD implements testC{
function echostr(){
echo "接口继承，要实现父接口所有相关方法!";
echo "
";
}
function dancing($name){
echo $name."正在跳舞!";
echo "
";
}
function singing($nickname){
echo $nickname."正在唱歌!";
}
}
$demo=new testD();
$demo->echostr();
$demo->dancing("模特");
$demo->singing("周杰伦");
//运行结果
/**
接口继承，要实现父接口所有相关方法!
模特正在跳舞!
周杰伦正在唱歌!
**/taritsMultiple inheritance
In multiple inheritance, a class can inherit multiple parent classes at the same time. The function of combining multiple parent classes is this model used in C to enhance the flexibility of integration, but multiple inheritance It is too flexible and will bring about "diamond inheritance", so it is difficult to use and the model becomes complicated. Now most languages have abandoned the multiple inheritance model.
But sometimes I want to use multiple inheritance, but PHP doesn’t have multiple inheritance, so I invented such a thing.
Traits can be understood as a set of methods that can be called by different classes, but Traits are not classes! They cannot be instantiated. Let’s take a look at the syntax with an example:
trait myTrait{
function traitMethod1(){}
function traitMethod2(){}
}
//然后是调用这个traits,语法为：
class myClass{
use myTrait;
}
//这样就可以通过use myTraits，调用Traits中的方法了，比如：
$obj = new myClass();
$obj-> traitMethod1 ();
$obj-> traitMethod2 ();
>The example in this article describes the method of multiple inheritance of PHP interface and tarits to achieve the effect of multiple inheritance. For more related knowledge, please pay attention to the PHP Chinese website.
Related recommendations:
Questions often encountered in PHP string reversal interviews
How to obtain the character stream in PHP The first non-repeating character in
PHP uses one line of code to delete all files in the directory.
The above is the detailed content of PHP interface multiple inheritance and tarits method to achieve multiple inheritance effect tutorial details. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1664
14
1423
52
1318
25
1269
29
1248
24
Explain JSON Web Tokens (JWT) and their use case in PHP APIs.
Apr 05, 2025 am 12:04 AM
JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,
PHP Program to Count Vowels in a String
Feb 07, 2025 pm 12:12 PM
A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total
Explain late static binding in PHP (static::).
Apr 03, 2025 am 12:04 AM
Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.
What are PHP magic methods (__construct, __destruct, __call, __get, __set, etc.) and provide use cases?
Apr 03, 2025 am 12:03 AM
What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.
PHP and Python: Comparing Two Popular Programming Languages
Apr 14, 2025 am 12:13 AM
PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.
PHP in Action: Real-World Examples and Applications
Apr 14, 2025 am 12:19 AM
PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.
PHP: A Key Language for Web Development
Apr 13, 2025 am 12:08 AM
PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7
The Enduring Relevance of PHP: Is It Still Alive?
Apr 14, 2025 am 12:12 AM
PHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.
