What has been updated in php8

php8 updates the JIT compiler, type system improvements, property improvements, exception improvements, function improvements, other improvements, etc. Detailed introduction: 1. JIT compiler, PHP8 introduces a brand new JIT compiler, which can compile PHP code into local machine code, thus improving execution speed; 2. Type system improvement, PHP8 has made major improvements to the type system. PHP supports static types, and you can specify types on function parameters and return values to improve the readability and maintainability of the code; 3. Attribute improvements, etc.

The operating system for this tutorial: Windows 10 system, PHP8.1.3 version, Dell G3 computer.

PHP 8 is the latest version of the PHP programming language, released on November 26, 2020. This version brings many important updates and improvements that make PHP programming even more powerful and efficient. This article will introduce some of the major updates in PHP 8.

1. JIT compiler: PHP 8 introduces a new JIT (Just-In-Time) compiler, which can compile PHP code into local machine code, thereby improving execution speed. The JIT compiler can optimize hotspot code at runtime, significantly improving the performance of PHP applications.

2. Type system improvements: PHP 8 has made major improvements to the type system. PHP now supports static typing, which allows you to specify types on function parameters and return values to improve code readability and maintainability. In addition, PHP 8 also introduces new types, such as union types and intersection types, making type declarations more flexible and powerful.

3. Attribute improvements: PHP 8 adds new features for attributes. Properties can now have default values and be type-declared at declaration time. In addition, PHP 8 also introduces new property access modifiers, such as private and protected, to improve code encapsulation and security.

4. Exception improvements: PHP 8 has improved exception handling. PHP now supports catching multiple exception types in a catch block, making exception handling more flexible and concise. In addition, PHP 8 also introduces new exception classes such as Stringable and Throwable to provide more exception handling options.

5. Function improvements: PHP 8 has made some improvements to functions. Now, PHP supports named parameters, and parameters can be passed by parameter names, which improves the readability of function calls. In addition, PHP 8 also introduces new functions, such as str_contains and str_starts_with, making string processing more convenient and efficient.

6. Other improvements: PHP 8 also brings many other improvements. For example, PHP 8 has improved error handling mechanisms, making error reporting clearer and more detailed. In addition, PHP 8 also improves array processing functions and introduces new array functions, such as array_is_list and array_is_associative, making array operations more convenient and flexible.

To summarize, PHP 8 is an important version update that brings many exciting new features and improvements. It provides higher performance, a more powerful type system, more flexible exception handling, more convenient function calls, and more language features. PHP developers can improve the performance and maintainability of their applications by upgrading to PHP 8.

The above is the detailed content of What has been updated in php8. For more information, please follow other related articles on the PHP Chinese website!