Practical Guide to Developing Brain Map Functions with PHP and Vue

Practical Guide to Developing Brain Map Functions with PHP and Vue

Introduction:
Brain mapping is a popular way of organizing information that can organize complex thinking or knowledge Relationships are presented graphically. In modern Internet application development, adding brain mapping functions can improve user experience and data visualization effects. This article will introduce how to use PHP and Vue to develop mind mapping functions, and provide practical guidance and code examples.

Technical introduction:

1. PHP: PHP is a server-side scripting language used to develop web applications. In this article, we will use PHP to handle database interactions and API requests.
2. Vue: Vue is a popular JavaScript framework used for building front-end user interfaces. In this article, we will use Vue to implement the front-end component of the brain map.

Development preparation:
Before we start, we need to ensure that the development environment of PHP and Vue has been installed. The required packages can be downloaded and installed on the official website.

Step 1: Database design
First, we need to design a database to store the relevant data of the brain map. The following is a simplified database table design example:

CREATE TABLE `nodes` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `title` varchar(255) NOT NULL,
  `parent_id` int(11) DEFAULT NULL,
  PRIMARY KEY (`id`),
  FOREIGN KEY (`parent_id`) REFERENCES `nodes` (`id`)
);

CREATE TABLE `edges` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `from_node_id` int(11) NOT NULL,
  `to_node_id` int(11) NOT NULL,
  PRIMARY KEY (`id`),
  FOREIGN KEY (`from_node_id`) REFERENCES `nodes` (`id`),
  FOREIGN KEY (`to_node_id`) REFERENCES `nodes` (`id`)
);

Step 2: Backend Development
Next, we start developing the backend code. First, create a PHP file named "api.php". In this file, we will implement the server-side API interface.

<?php
  // 连接数据库
  $db = new mysqli('localhost', 'username', 'password', 'database');
  
  // 获取所有节点
  function getAllNodes() {
    global $db;
    $result = $db->query("SELECT * FROM `nodes`");
    $nodes = array();
    while ($row = $result->fetch_assoc()) {
      $nodes[] = $row;
    }
    return $nodes;
  }
  
  // 获取所有边
  function getAllEdges() {
    global $db;
    $result = $db->query("SELECT * FROM `edges`");
    $edges = array();
    while ($row = $result->fetch_assoc()) {
      $edges[] = $row;
    }
    return $edges;
  }
  
  // 设置HTTP响应标头
  header('Content-Type: application/json');
  
  // 处理API请求
  $method = $_SERVER['REQUEST_METHOD'];
  $path = $_SERVER['REQUEST_URI'];
  
  if ($method === 'GET' && $path === '/api/nodes') {
    echo json_encode(getAllNodes());
  } else if ($method === 'GET' && $path === '/api/edges') {
    echo json_encode(getAllEdges());
  } else {
    http_response_code(404);
    echo json_encode(array('error' => 'Not Found'));
  }
?>

Step 3: Front-end development
Now, we start developing the front-end code. Create a Vue component named "MindMap.vue". In this component, we will use Vue's data binding and componentization technology to implement the interactive function of the brain map.

<template>
  <div>
    <div id="mindmap"></div>
  </div>
</template>

<script>
  export default {
    mounted() {
      // 从API获取数据
      fetch('/api/nodes')
        .then(response => response.json())
        .then(nodes => {
          // 使用数据来绘制脑图
          const mindmap = new d3.Mindmap('#mindmap')
            .nodes(nodes)
            .edges(this.edges)
            .render();
        });
    },
    computed: {
      edges() {
        // 从API获取边
        return fetch('/api/edges')
          .then(response => response.json())
          .then(edges => edges);
      }
    }
  }
</script>

<style>
  #mindmap {
    width: 800px;
    height: 600px;
  }
</style>

Step Four: Run the Application
Now, we have completed the development of the back-end code and the front-end code. You can run the following command in the command line to start the local server and view the running effect of the application:

php -S localhost:8000

Open the browser and visit "http://localhost:8000" to view the mind mapping function of the application .

Conclusion:
This article introduces a practical guide on how to use PHP and Vue to develop brain mapping functions, and provides relevant code examples. By studying this article, you can learn how to use PHP and Vue to implement database interaction and front-end componentization functions of brain maps. I hope this article can be helpful to your development work, and I wish you happy development!

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