Home Backend Development PHP Tutorial Detailed introduction to cloning method

Detailed introduction to cloning method

Jun 11, 2017 am 11:47 AM

We already know that when calling an object using a pass-by-reference method, the actual call is the same object. Sometimes it is necessary to create a copy of the object. When changing the original object, we do not want to affect the copy. In PHP, you can use Use the current object to clone an identical object. The cloned copy is completely independent of the original two objects and does not interfere with each other. Let’s take a simple example to see how to use clone: ​​

1. ##Introduction: We have known before that when calling an object using a reference by address, the actual call is the same object. Sometimes it is necessary to create a copy of the object. When changing the original object, we do not want to affect the copy. In PHP, you can clone an identical object based on the current object. The cloned copy is completely independent of the original two objects and does not interfere with each other. Let’s take a simple example to see how to use cloning:

2. Singleton Mode PHP Implementation_PHP TutorialDetailed introduction to cloning method

Introduction: PHP implementation of singleton mode. The singleton mode ensures that there is only one instance of a class; 1. Static member variables save the only instance of the class 2. Declare the constructor and clone method as private to prevent new instances 3. Provide a

3. PHP implementation of singleton mode

Introduction: Singleton mode PHP implementation singleton mode ensures that there is only one instance of a certain class; 1. Static member variables save the only instance of the class 2. Declare the constructor and clone method as private to prevent new instances. 3. Provide a public static method to access this instance and return a reference to the unique instance.

4. PHP cashing in singleton mode

Introduction: singleton mode PHP implements the singleton mode to ensure that there is only one instance of a class; 1. Static member variables save the only instance of the class 2. Declare the constructor and clone method as private to prevent new instances 3. Provide a public static method to access this instance , return the reference of the only instance

5. PHP implementation of singleton mode

Introduction: PHP implementation of singleton mode. The singleton mode ensures that there is only one instance of a class; 1. Static member variables save the only instance of the class 2. Declare the constructor and clone method as private to prevent new instances 3. Provide a

6. StarCraft PHP Prototype Mode

Introduction: Problem to be solved: Can we reduce the use of new while avoiding the need to add new objects? time, understand the class name of the object. Idea: php5 provides a cloning method. We can add an object, and then every time we need to add an object of the same type as her, just clone it.

7. js array cloning method summary_javascript skills

Introduction: In JS, for object types Variable references are operated through "pointers" like C, and if multiple variables refer to the same object, any operation of one variable on the object will affect other variables.

【Related Q&A recommendations】:

The above is the detailed content of Detailed introduction to cloning method. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
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

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

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Explain JSON Web Tokens (JWT) and their use case in PHP APIs. 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,

How does session hijacking work and how can you mitigate it in PHP? How does session hijacking work and how can you mitigate it in PHP? Apr 06, 2025 am 12:02 AM

Session hijacking can be achieved through the following steps: 1. Obtain the session ID, 2. Use the session ID, 3. Keep the session active. The methods to prevent session hijacking in PHP include: 1. Use the session_regenerate_id() function to regenerate the session ID, 2. Store session data through the database, 3. Ensure that all session data is transmitted through HTTPS.

How to debug CLI mode in PHPStorm? How to debug CLI mode in PHPStorm? Apr 01, 2025 pm 02:57 PM

How to debug CLI mode in PHPStorm? When developing with PHPStorm, sometimes we need to debug PHP in command line interface (CLI) mode...

Describe the SOLID principles and how they apply to PHP development. Describe the SOLID principles and how they apply to PHP development. Apr 03, 2025 am 12:04 AM

The application of SOLID principle in PHP development includes: 1. Single responsibility principle (SRP): Each class is responsible for only one function. 2. Open and close principle (OCP): Changes are achieved through extension rather than modification. 3. Lisch's Substitution Principle (LSP): Subclasses can replace base classes without affecting program accuracy. 4. Interface isolation principle (ISP): Use fine-grained interfaces to avoid dependencies and unused methods. 5. Dependency inversion principle (DIP): High and low-level modules rely on abstraction and are implemented through dependency injection.

How to automatically set permissions of unixsocket after system restart? How to automatically set permissions of unixsocket after system restart? Mar 31, 2025 pm 11:54 PM

How to automatically set the permissions of unixsocket after the system restarts. Every time the system restarts, we need to execute the following command to modify the permissions of unixsocket: sudo...

Explain late static binding in PHP (static::). 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.

Framework Security Features: Protecting against vulnerabilities. Framework Security Features: Protecting against vulnerabilities. Mar 28, 2025 pm 05:11 PM

Article discusses essential security features in frameworks to protect against vulnerabilities, including input validation, authentication, and regular updates.

See all articles