Home Backend Development PHP Tutorial Detailed explanation of PHP 8.3 update: a powerful tool to solve annoying problems

Detailed explanation of PHP 8.3 update: a powerful tool to solve annoying problems

Nov 27, 2023 pm 01:11 PM
php renew Detailed explanation A powerful tool for solving annoying problems

PHP 8.3更新详解:解决烦人问题的利器

Detailed explanation of PHP 8.3 update: a powerful tool to solve annoying problems

PHP 8.3 is a major update to the PHP language. I believe most developers have noticed it, and it can help us solve many annoying problems. In this article, we will introduce in detail the updated content and functions of PHP 8.3, and how to maximize its benefits in projects.

New features:

  1. Added "non-static callable" type

This type is introduced when using callable objects in callbacks A new genre. Previously, to use a callable object, you had to use "callable"; but the callable type includes both static and non-static methods, which requires some additional logic to be used during use.

In PHP8.3, we can use the "non-static callable" type to represent non-static methods of callable objects. In this way, you can directly use the function name to call non-static methods, simplifying the code.

Example:

class Test {
    public function sayHello() {
        echo 'Hello!';
   }
}
$test = new Test();
$callback = [$test, 'sayHello'];
$callback(); // Hello!
Copy after login
  1. New "POSIX semaphore" extension

PHP 8.3 also introduces POSIX semaphore extension to achieve inter-process Synchronization and communication. POSIX semaphore is a very flexible and efficient process synchronization and communication mechanism that can help us pass signals between processes and achieve many tasks.

Example:

$sem = sem_get(123);
sem_acquire($sem);
// 执行一些操作
sem_release($sem);
sem_remove($sem);
Copy after login
  1. Added "union types"

PHP 8.3 brings us a new type feature - union types. It allows us to combine multiple types together to form a new type.

Example:

function foo(string|int $value): void {
    // ...
}
Copy after login

In the above example, the parameter $value can be of type string or int.

  1. Multi-target structural statements also support break/continue

In PHP 8.3, we can use break and continue in multi-target structural statements (such as switch). Break out of the loop.

Example:

switch (true) {
    case $value === 0:
        echo 'value is 0';
        break;
    case $value > 0:
        echo 'value is greater than 0';
        break;
    default:
        echo 'value is less than 0';
        break;
}
Copy after login
  1. Generic types can be used in function prototypes

In PHP 8.3, we can use generic types in function prototypes Type (similar to Java). This allows for better definition of parameter types.

Example:

function map(callable $callback, array<T> $arr): array<U> {
    $result = [];
    foreach ($arr as $key => $value) {
        $result[$key] = $callback($value);
    }
    return $result;
}
Copy after login

In the above example, we have used the generic types T and U.

  1. Added array remove function

In PHP 8.3, we can use the array_remove function to delete specified elements in an array.

Example:

$array = ['a', 'b', 'c'];
array_remove($array, 'b');
print_r($array); // ['a', 'c']
Copy after login
  1. Optimizing the string concatenation operator

In PHP 8.3, the implementation of the string concatenation operator (.) was improved Optimized to handle string concatenation operations faster.

Example:

$str = '';
for ($i = 0; $i < 10000; $i++) {
    $str .= $i;
}
Copy after login

We can feel the performance improvement when using string concatenation in a loop.

Summary:

The above are the main updates and functions of PHP 8.3. Through these new features, PHP 8.3 can better meet our development needs. Now it's time to start using PHP 8.3 and solve those annoying problems to improve our productivity and performance.

The above is the detailed content of Detailed explanation of PHP 8.3 update: a powerful tool to solve annoying problems. 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)

PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian Dec 24, 2024 pm 04:42 PM

PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati

7 PHP Functions I Regret I Didn't Know Before 7 PHP Functions I Regret I Didn't Know Before Nov 13, 2024 am 09:42 AM

If you are an experienced PHP developer, you might have the feeling that you’ve been there and done that already.You have developed a significant number of applications, debugged millions of lines of code, and tweaked a bunch of scripts to achieve op

How To Set Up Visual Studio Code (VS Code) for PHP Development How To Set Up Visual Studio Code (VS Code) for PHP Development Dec 20, 2024 am 11:31 AM

Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c

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,

PHP Program to Count Vowels in a String 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

How do you parse and process HTML/XML in PHP? How do you parse and process HTML/XML in PHP? Feb 07, 2025 am 11:57 AM

This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an

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.

What are PHP magic methods (__construct, __destruct, __call, __get, __set, etc.) and provide use cases? 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.

See all articles