PHP8's new features bring revolutionary changes to code writing

PHP is a widely used server-side programming language. Due to its simplicity and ease of use, its suitability for popular programming tastes and its benefits in website development, PHP has become the programming language for many websites.

The PHP 8 upgrade brings some major changes that can bring huge benefits to developers. Here are the most important new features of PHP 8.

1. JIT Compiler

The JIT (Just-In-Time) compiler is a tool used to compile code at runtime. It can convert the code in PHP into better machine code to accelerate the execution of the code, thereby increasing the speed of the code running to a new height. This feature gives PHP a greater advantage when executing simple algorithms and processing large amounts of data.

2. Mandatory named parameters

In previous versions, the parameters of a function or method were passed positionally, which meant that the parameters had to be specified when calling the function. delivered in sequence. But in PHP 8, you can set a name for each parameter, so that the parameters can be passed by name when calling the function, that is, the parameters are forced to be named.

3. Union Types

In PHP 8, you can use union types to define the parameter and return value types of a function or method. This allows developers to specify multiple types and have more flexibility in writing code within the constraints of that type.

For example, if you want to check whether a variable is of type integer or string, you can make them union types and you can reuse the function to support more types without changing the code.

4. Static return type

In PHP 8, static return types were introduced, which allow the return values ​​​​of functions and methods to be detected at runtime, thereby improving code reliability and readability. Static type return means specifying the return type (int, string, bool, etc.) in the function declaration and also defining the value of each return type.

This allows developers to specify the return value type of a function in a more explicit way in the function's code and makes the code easier to read. In addition, static return types help IDEs better interpret code logic strictly.

5. Passing attributes in class constructors

In PHP 8, you can pass attributes as parameters when defining a class and its constructor at the same time, which makes it possible to More convenient when developing classes. It is no longer necessary to use separate setter functions when creating a new class and assigning properties.

6. Non-local non-static name reference

In PHP 8, a new anonymous class has been added that allows non-static methods to access non-static properties. This means that when calling an anonymous class, you can use the property of the outer class, even outside the method.

In previous versions, if you wanted to access a property in an external class, you needed to pass it in as a parameter, which was very cumbersome.

Summary

PHP 8 brings some major changes that promote code writing and operating efficiency. This step ensures that PHP will continue to be improved and developed in the future, so it is eagerly awaited by developers. Whether you are a newbie or an experienced developer, PHP 8 brings a new opportunity to write more efficient and maintainable code.

The above is the detailed content of PHP8's new features bring revolutionary changes to code writing. For more information, please follow other related articles on the PHP Chinese website!