What does :: mean in php
Double colon (::) is used in PHP for: 1. Namespace delimiter; 2. Static method call; 3. Parent class access; 4. Constant access; 5. Delayed static binding. For example, MyNamespace::MyClass represents the namespace delimiter, while MyClass::myStaticMethod() represents a static method call.
Double colon (::) in PHP
Double colon (::) in PHP has the following Purpose:
1. Namespace separator
- In PHP 5.3 and later versions, double colons are used to separate classes and functions in the namespace and constants.
- For example:
MyNamespace::MyClass
2. Static method call
- Double colon is available For calling static methods of a class without having to instantiate the class.
- For example:
MyClass::myStaticMethod()
##3. Parent class access
- Double The colon can be used to access the properties and methods of the parent class.
- For example:
- parent::myProperty
4. Constant access
- Double colon can be used Access the constants of a class without having to go through the class name.
- For example:
- MyClass::MY_CONSTANT
5. Delayed static binding (LSB)
- Double colons can be used to implement delayed static binding, allowing the method to be called to be determined at runtime.
- For example:
- static::myMethod()
Example:
// 命名空间分隔符 namespace MyNamespace; class MyClass {} // 静态方法调用 class Foo { public static function myStaticMethod() { echo "This is a static method.\n"; } } Foo::myStaticMethod(); // 父类访问 class Bar extends Foo { public function myChildMethod() { echo "This is a child method.\n"; parent::myStaticMethod(); } } $bar = new Bar(); $bar->myChildMethod(); // 常量访问 class Baz { const MY_CONSTANT = 'Hello, world!'; } echo Baz::MY_CONSTANT;
The above is the detailed content of What does :: mean in php. 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

AI Hentai Generator
Generate AI Hentai for free.

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

Long URLs, often cluttered with keywords and tracking parameters, can deter visitors. A URL shortening script offers a solution, creating concise links ideal for social media and other platforms. These scripts are valuable for individual websites a

Laravel simplifies handling temporary session data using its intuitive flash methods. This is perfect for displaying brief messages, alerts, or notifications within your application. Data persists only for the subsequent request by default: $request-

This is the second and final part of the series on building a React application with a Laravel back-end. In the first part of the series, we created a RESTful API using Laravel for a basic product-listing application. In this tutorial, we will be dev

Laravel provides concise HTTP response simulation syntax, simplifying HTTP interaction testing. This approach significantly reduces code redundancy while making your test simulation more intuitive. The basic implementation provides a variety of response type shortcuts: use Illuminate\Support\Facades\Http; Http::fake([ 'google.com' => 'Hello World', 'github.com' => ['foo' => 'bar'], 'forge.laravel.com' =>

The PHP Client URL (cURL) extension is a powerful tool for developers, enabling seamless interaction with remote servers and REST APIs. By leveraging libcurl, a well-respected multi-protocol file transfer library, PHP cURL facilitates efficient execution of various network protocols, including HTTP, HTTPS, and FTP. This extension offers granular control over HTTP requests, supports multiple concurrent operations, and provides built-in security features.

Do you want to provide real-time, instant solutions to your customers' most pressing problems? Live chat lets you have real-time conversations with customers and resolve their problems instantly. It allows you to provide faster service to your custom

The 2025 PHP Landscape Survey investigates current PHP development trends. It explores framework usage, deployment methods, and challenges, aiming to provide insights for developers and businesses. The survey anticipates growth in modern PHP versio

In this article, we're going to explore the notification system in the Laravel web framework. The notification system in Laravel allows you to send notifications to users over different channels. Today, we'll discuss how you can send notifications ov
