search
HomeBackend DevelopmentPHP TutorialPHP mode design registration tree mode, PHP mode design_PHP tutorial

php pattern design registration tree pattern, php pattern design

After the first two articles of singleton pattern and factory pattern, we finally come to the last basic design pattern-- Register tree mode.

 What is the registration tree mode?

Of course, the registration tree mode is also called registration mode and registrar mode. The reason why I am pretentious about its name here is because I feel that the name registration tree is easier for people to understand. Like the previous two articles, our article still starts with the name. The registration tree pattern is a pattern design method that registers object instances to a global object tree and picks from the object tree when needed. This reminds me of buying candied haws on a stick when I was a kid. The candied haws seller would stick the candied haws on a big pole and people would take them off when they bought them. The difference is that in the registration tree mode, there will still be some after being picked, and it can be picked many times, but the candied haws will be gone after being picked once. . .

 Why should we use registration tree mode?

The singleton mode solves the problem of how to create a unique object instance in the entire project, and the factory mode solves the problem of how to create an instance object without using new. So what problem does the registration tree mode want to solve? Before considering this issue, we still need to consider the limitations currently faced by the first two models. First of all, the process of creating a unique object in the singleton mode itself also has a judgment, that is, whether the object exists. If it exists, the object is returned; if it does not exist, the object is created and returned. Every time an instance object is created, there must be such a layer of judgment. The factory model considers more the issue of extended maintenance. In general, the singleton pattern and factory pattern can produce more reasonable objects. How to conveniently call these objects? Moreover, the objects created in this way in the project are like scattered soldiers, making it inconvenient for overall management and arrangement. Therefore, the registration tree model came into being. Regardless of whether you generate objects through singleton mode, factory mode, or a combination of the two, they are all "inserted" into the registration tree. When I use an object, I just fetch it directly from the registration tree. This is as convenient and practical as using global variables. And the registration tree pattern also provides a very good idea for other patterns.

How to implement a registration tree?

Through the above description, we seem to have easily found a solution. First we need a class as a registration tree, of course. All objects are "inserted" into the registration tree. This registration tree should be served by a static variable. And this registration tree should be a two-dimensional array. This class should have a method for inserting object instances (set()), and correspondingly there should be a method for undoing object instances (_unset()). Of course, the most important thing is to have a method to read the object (get()). With these, we can happily complete the registration tree mode~~~

Now let’s make a small combination of the three modes. Simply creating an instance object is far less complicated, but when applied to large projects, the convenience is self-evident.

<?<span>php<br />//创建单例
</span><span>class</span><span> Single{
    </span><span>public</span> <span>$hash</span><span>;
    </span><span>static</span> <span>protected</span> <span>$ins</span>=<span>null</span><span>;
    </span><span>final</span> <span>protected</span> <span>function</span><span> __construct(){
        </span><span>$this</span>->hash=<span>rand</span>(1,9999<span>);
    }

    </span><span>static</span> <span>public</span> <span>function</span><span> getInstance(){
        </span><span>if</span> (self::<span>$ins</span><span> instanceof self) {
            </span><span>return</span> self::<span>$ins</span><span>;
        }
        self</span>::<span>$ins</span>=<span>new</span><span> self();
        </span><span>return</span> self::<span>$ins</span><span>;
    } 
}

//工厂模式
</span><span>class</span><span> RandFactory{
    </span><span>public</span> <span>static</span> <span>function</span><span> factory(){
        </span><span>return</span> Single::<span>getInstance();
    }
}

//注册树
</span><span>class</span><span> Register{
    </span><span>protected</span> <span>static</span> <span>$objects</span><span>;
    </span><span>public</span> <span>static</span> <span>function</span> set(<span>$alias</span>,<span>$object</span><span>){
        self</span>::<span>$objects</span>[<span>$alias</span>]=<span>$object</span><span>;
    }
    </span><span>public</span> <span>static</span> <span>function</span> get(<span>$alias</span><span>){
        </span><span>return</span> self::<span>$objects</span>[<span>$alias</span><span>];
    }
    </span><span>public</span> <span>static</span> <span>function</span> _unset(<span>$alias</span><span>){
        </span><span>unset</span>(self::<span>$objects</span>[<span>$alias</span><span>]);
    }
}

Register</span>::set('rand',RandFactory::<span>factory());

</span><span>$object</span>=Register::get('rand'<span>);

</span><span>print_r</span>(<span>$object</span>);

 

At this point, the introduction of the three modes of design is completed. Various pattern designs themselves will complement each other. When introducing other patterns in the future, one or more other design patterns will be used more or less.

It doesn’t matter if you don’t understand a certain model. I believe that with the in-depth programming, there will be a surprise of sudden enlightenment. I hope you will make progress with me.

 

Series of articles:

  PHP pattern design singleton pattern

 PHP pattern design factory pattern

 PHP pattern design registration tree pattern

 

www.bkjia.comtruehttp: //www.bkjia.com/PHPjc/1048721.htmlTechArticlePHP pattern design registration tree pattern, php pattern design finally follows the first two articles of singleton pattern and factory pattern. The last basic design pattern is ushered in-the registration tree pattern. What is registration...
Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Beyond the Hype: Assessing PHP's Role TodayBeyond the Hype: Assessing PHP's Role TodayApr 12, 2025 am 12:17 AM

PHP remains a powerful and widely used tool in modern programming, especially in the field of web development. 1) PHP is easy to use and seamlessly integrated with databases, and is the first choice for many developers. 2) It supports dynamic content generation and object-oriented programming, suitable for quickly creating and maintaining websites. 3) PHP's performance can be improved by caching and optimizing database queries, and its extensive community and rich ecosystem make it still important in today's technology stack.

What are Weak References in PHP and when are they useful?What are Weak References in PHP and when are they useful?Apr 12, 2025 am 12:13 AM

In PHP, weak references are implemented through the WeakReference class and will not prevent the garbage collector from reclaiming objects. Weak references are suitable for scenarios such as caching systems and event listeners. It should be noted that it cannot guarantee the survival of objects and that garbage collection may be delayed.

Explain the __invoke magic method in PHP.Explain the __invoke magic method in PHP.Apr 12, 2025 am 12:07 AM

The \_\_invoke method allows objects to be called like functions. 1. Define the \_\_invoke method so that the object can be called. 2. When using the $obj(...) syntax, PHP will execute the \_\_invoke method. 3. Suitable for scenarios such as logging and calculator, improving code flexibility and readability.

Explain Fibers in PHP 8.1 for concurrency.Explain Fibers in PHP 8.1 for concurrency.Apr 12, 2025 am 12:05 AM

Fibers was introduced in PHP8.1, improving concurrent processing capabilities. 1) Fibers is a lightweight concurrency model similar to coroutines. 2) They allow developers to manually control the execution flow of tasks and are suitable for handling I/O-intensive tasks. 3) Using Fibers can write more efficient and responsive code.

The PHP Community: Resources, Support, and DevelopmentThe PHP Community: Resources, Support, and DevelopmentApr 12, 2025 am 12:04 AM

The PHP community provides rich resources and support to help developers grow. 1) Resources include official documentation, tutorials, blogs and open source projects such as Laravel and Symfony. 2) Support can be obtained through StackOverflow, Reddit and Slack channels. 3) Development trends can be learned by following RFC. 4) Integration into the community can be achieved through active participation, contribution to code and learning sharing.

PHP vs. Python: Understanding the DifferencesPHP vs. Python: Understanding the DifferencesApr 11, 2025 am 12:15 AM

PHP and Python each have their own advantages, and the choice should be based on project requirements. 1.PHP is suitable for web development, with simple syntax and high execution efficiency. 2. Python is suitable for data science and machine learning, with concise syntax and rich libraries.

PHP: Is It Dying or Simply Adapting?PHP: Is It Dying or Simply Adapting?Apr 11, 2025 am 12:13 AM

PHP is not dying, but constantly adapting and evolving. 1) PHP has undergone multiple version iterations since 1994 to adapt to new technology trends. 2) It is currently widely used in e-commerce, content management systems and other fields. 3) PHP8 introduces JIT compiler and other functions to improve performance and modernization. 4) Use OPcache and follow PSR-12 standards to optimize performance and code quality.

The Future of PHP: Adaptations and InnovationsThe Future of PHP: Adaptations and InnovationsApr 11, 2025 am 12:01 AM

The future of PHP will be achieved by adapting to new technology trends and introducing innovative features: 1) Adapting to cloud computing, containerization and microservice architectures, supporting Docker and Kubernetes; 2) introducing JIT compilers and enumeration types to improve performance and data processing efficiency; 3) Continuously optimize performance and promote best practices.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
3 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
3 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. How to Fix Audio if You Can't Hear Anyone
3 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
WWE 2K25: How To Unlock Everything In MyRise
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

DVWA

DVWA

Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

mPDF

mPDF

mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

EditPlus Chinese cracked version

EditPlus Chinese cracked version

Small size, syntax highlighting, does not support code prompt function