What features does php8 have?

Features of php8: 1. JIT compiler; 2. Named parameters; 3. Union types; 4. Annotations; 5. Constructor attribute promotion; 6. Match expression; 7. nullsafe operator; 8 , Improved type system; 9. Error handling improvements; 10. Consistency improvements. Detailed introduction: 1. JIT compiler, PHP8 introduces just-in-time compilation technology, which compiles PHP code into native machine code, thereby improving the execution speed of the program; 2. Named parameters, PHP8 supports named parameters, allowing the use of parameter names when calling functions. etc.

The operating system for this tutorial: Windows 10 system, DELL G3 computer.

PHP 8 is a programming language and it is the latest version of the PHP programming language. PHP 8 was released on November 26, 2020, bringing many new features and improvements. The main features include JIT compiler, type system improvements, attribute annotations, anonymous class improvements, error handling improvements, etc. PHP developers can improve development productivity and application performance by upgrading to PHP 8. However, since PHP8 introduces some incompatible changes, developers need to carefully check and update their code to ensure that it runs properly under PHP8.

PHP 8 has many new features and improvements. Here are some of the main features:

1. JIT compiler: Introduced in PHP 8 It uses just-in-time compilation (JIT) technology to compile PHP code into native machine code, thus improving the execution speed of the program. The JIT compiler has the more potential of the two, showing three times better performance on synthetic benchmarks and 1.5-2x performance improvement on some long-running programs.

2. Named parameters: PHP 8 supports named parameters, allowing the use of parameter names instead of parameter order to pass values ​​when calling functions. This makes the code clearer and easier to read.

3. Union types: PHP 8 introduced union types, allowing function parameters and return values ​​to have multiple types. This increases code flexibility and readability.

4. Annotations: PHP 8 introduced annotations, allowing metadata comments to be added to the code. These annotations can be used for code generation, documentation generation, or runtime behavior modification, etc.

5. Constructor attribute promotion: PHP 8 allows direct initialization of class attributes in the constructor. This makes the code cleaner and easier to read.

6. Match expression: PHP 8 introduces match expression, which is similar to the switch statement, but provides more powerful matching capabilities and concise syntax.

7. Nullsafe operator: PHP 8 introduced the nullsafe operator (?->), which allows checking whether an object is null before accessing its properties. This avoids null pointer exceptions.

8. Improved type system: PHP 8 has improved the type system, including support for enumerated types, use of the final keyword, and improvements to type inference.

9. Error handling improvements: PHP 8 has improved error handling, including improvements in exception handling and control of error reporting levels.

10. Consistency improvements: PHP 8 maintains consistency in syntax and functionality, fixes some inconsistent syntax and behavior, and improves the maintainability and readability of the code. .

The above are just some of the features of PHP 8. In fact, PHP 8 also contains many other new features and optimization items designed to improve the efficiency and stability of applications. These features make PHP 8 a powerful and flexible programming language suitable for various web development scenarios.

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