How to write the backend without using php tags

In website development, background management often needs to be implemented using server-side programming languages. PHP is one of the most widely used server-side programming languages. However, using PHP tags to write back-end code faces problems such as confusion with front-end code and poor readability in many cases. In this article, we will explore how to implement code-behind without using PHP tags.

1. Overview

PHP is a popular server-side programming language, which is widely used in website development and backend management. However, when using PHP tags to write back-end code, you often face problems such as confusion with front-end code and poor readability. In order to solve these problems, we can consider using concepts such as "controller", "model", and "view" to implement the background code.

2. Controller

The controller is the core of the background code. It is responsible for receiving and processing requests from the front end, and returning corresponding data or pages according to the request. The separation of the controller from the front-end code can make the back-end code more readable and easier to maintain and modify.

We can use PHP files to implement controllers without using PHP tags. For example, we can create a file named "index.php" as a controller and write relevant code in this file to receive and process requests. For example:

<?php

$action = $_GET['action'];

switch ($action) {
     case 'login':
          // 处理登录请求
          break;
     case 'add':
          // 处理添加新数据请求
          break;
     case 'delete':
          // 处理删除数据请求
          break;
     default:
          // 处理其他请求
          break;
}

In the above code, we use $_GET['action'] to obtain the operation type of the front-end request, and process the corresponding request according to different operation types in the switch statement. In this way, we can implement the functionality of the background controller without using PHP tags.

3. Model

The model is the part of the background code related to data operations. It is mainly responsible for database operations, such as adding/modifying/deleting data, querying data, etc. When using the model, we can use a file named "model.php" to separate the code and encapsulate the database operation code into the file.

For example, we encapsulate an addData() function in the "model.php" file to add data to the database. The following is a simple sample code:

<?php

function addData($data) {
     // 数据库连接及添加数据的代码
}

When we need to add new data, we can call the addData() function in model.php in the controller code and pass the data that needs to be added as a parameter to the function.

4. View

The view is the part of the background code responsible for displaying the results. Without using PHP tags, we can use HTML and CSS code to implement the background view. After processing the front-end request in the controller, we can use the include() function to introduce the view file to display the processing results to the user.

For example, we can write the following code in the index.php file:

<?php

$action = $_GET['action'];

switch ($action) {
     case 'login':
          // 处理登录请求，并返回登录成功/失败的结果页面
          include 'login_result.html';
          break;
     case 'add':
          // 处理添加新数据请求，并返回添加结果页面
          include 'add_result.html';
          break;
     case 'delete':
          // 处理删除数据请求，并返回删除结果页面
          include 'delete_result.html';
          break;
     default:
          // 处理其他请求
          break;
}

In the above code, after processing the request, we introduce the corresponding result page template according to different request types. to show the results of processing.

5. Summary

In this article, we introduced how to implement the code of the background controller, model and view part without using PHP tags. By using controllers, models, and views, we can make the code behind more readable and maintainable. In actual projects, we can flexibly apply these technologies according to needs to achieve more efficient backend management.

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