What are the new features of php8

The new features of php8 include JIT compiler, type deduction, named parameters, union types, properties, error handling improvements, asynchronous programming support, new standard library functions and anonymous class extensions. Detailed introduction: 1. JIT compiler, PHP8 introduces the JIT compiler, which is an important performance improvement. The JIT compiler can compile and optimize some high-frequency execution codes in real time, thereby improving the running speed; 2. Type derivation , PHP8 introduces the type inference function, allowing developers to automatically deduce the type of variables when declaring variables, etc.

PHP 8 is the latest version of the PHP programming language, bringing many exciting new features and improvements. The following are some of the main new features of PHP 8:

1. JIT (Just-In-Time) compiler:

PHP 8 introduces the JIT compiler, which is an important performance improvement . The JIT compiler can compile and optimize some frequently executed code in real time, thereby improving running speed. According to PHP official test data, the performance of PHP 8 is improved by 10% to 15% compared to PHP 7.4.

2. Type inference:

PHP 8 introduces the type inference function, allowing developers to automatically deduce the type of variables when declaring variables. This makes the code more concise and readable, and reduces type-related errors and vulnerabilities.

3. Named parameters:

PHP 8 introduced the named parameter feature, allowing developers to call functions by parameter name instead of parameter order. This makes function calls clearer and easier to understand, especially when dealing with functions with a large number of optional parameters.

4. Union types:

PHP 8 introduced the union types function, allowing a variable to have multiple possible types. This allows developers to be more flexible with variable types and simplifies the process of type conversion.

5. Attributes:

PHP 8 introduced the attributes function, allowing developers to add metadata to classes and class members. This provides developers with more flexibility to use properties to annotate and describe the characteristics of classes, thereby better supporting metaprogramming and metadata-driven development.

6. Error handling improvements:

PHP 8 improves the error handling mechanism and introduces a new ErrorException class and try-catch-finally statement. This makes exception handling more convenient and consistent, and developers can better control and handle exceptions in their code.

7. Asynchronous programming support:

PHP 8 introduces native support for asynchronous programming. By introducing new asynchronous functions and keywords, developers can write more efficiently and responsively code. This is useful for applications that handle high concurrency and asynchronous tasks.

8. New standard library functions:

PHP 8 introduces many new standard library functions, such as str_contains(), str_starts_with(), str_ends_with(), etc. These functions make processing strings more convenient and intuitive, improving the readability and maintainability of the code.

9. Extension of anonymous classes:

PHP 8 extends the functionality of anonymous classes. Now anonymous classes can implement interfaces and inherit other classes. This allows developers to use anonymous classes more flexibly to implement specific functions and logic.

10. Other improvements:

PHP 8 also includes many other improvements, such as improved error reporting, improved regular expression engine, improved string and array functions, improved date and time function etc. These improvements make PHP 8 more powerful, easier to use, and provide a better development experience.

Summary:

PHP 8 brings many exciting new features and improvements, including JIT compiler, type deduction, named parameters, union types, properties, error handling improvements, asynchrony Programming support, new standard library functions, and more. These new features make PHP 8 more powerful, efficient and easier to use, providing developers with more tools and features to build high-quality applications. For existing PHP developers and developers new to the PHP community, PHP 8 is a version worth paying attention to and using.

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