One article to understand the front-end method in thinkphp5

With the continuous development of Internet technology, the development of web applications has become increasingly mature and popular. In web application development, the use of frameworks is inevitable. Thinkphp5 is one of the most widely used PHP frameworks at present. In the process of developing web applications using thinkphp5, the front-end method is a very important development method. However, many beginners encounter some difficulties in understanding and using the prefix method. This article will start from three aspects: concepts, features, and usage methods to provide some useful help for beginners.

1. Concept

Pre-method refers to performing some other methods or operations before executing a method. It is usually used for authority authentication, data verification and logging. The pre-method is executed earlier than the post-method, and preprocessing and data preparation are performed before the main method is executed.

2. Features

1. Execution order: The pre-method defined in the controller will be executed before other methods in the controller are executed.
2. Inheritance: Pre-methods can be inherited into subclasses, which improves the degree of code reuse.
3. Multiple pre-methods can be set to meet the needs of different scenarios.

3. How to use

In thinkphp5, using the prefix method is very simple. We only need to define one or more methods ending with _before in the controller class. These methods will be executed before other controller methods are executed. For example:

class Blog extends Controller {

    // 定义前置方法
    protected function _before() {
        // 实现权限认证、数据过滤等预处理工作
    }

    // 定义其他方法
    public function index() {
        // 具体的业务逻辑
    }
}

When we access the index method, the _before method will be automatically executed. In this way, we can implement various types of front-end methods, such as permission authentication, data verification, logging, etc.

In short, the front-end method is a very important development method, and it is also very simple to use in thinkphp5. Beginners can define their own front-end methods according to their own needs to improve the maintainability and readability of the code.

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