An advanced technical guide to building mind mapping applications with PHP and Vue

Advanced Technical Guide for Building Brain Map Applications with PHP and Vue

Introduction:
Brain maps are widely used as an intuitive and concise graphical display method. Used in scenarios such as project management, knowledge organization, and mind mapping. In this article, we will explore how to build a powerful mind mapping application using PHP and Vue. We will make our mind mapping application more practical and easier to use by introducing some advanced technologies, including data persistence, real-time collaborative editing, drag-and-drop and other functions.

1. Database and data persistence
   In the process of building a mind map application, data persistence is a very important step. We can use MySQL or other relational databases to store and manage brain map related data. The following is a sample code for using PHP to connect to a MySQL database:

<?php
$servername = "localhost";
$username = "your_username";
$password = "your_password";
$dbname = "your_database";

// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);

// 检查连接是否成功
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

// 执行SQL查询和操作
$sql = "SELECT * FROM mindmaps";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    // 输出数据
    while($row = $result->fetch_assoc()) {
        echo "id: " . $row["id"]. " - Name: " . $row["name"]. "<br>";
    }
} else {
    echo "0 结果";
}

// 关闭连接
$conn->close();
?>

2. Real-time collaborative editing
   In team collaboration scenarios, real-time collaborative editing is a very important function. We can use the WebSocket protocol to implement real-time editing functionality. The following is a sample code for implementing a WebSocket server using PHP:

<?php
use RatchetMessageComponentInterface;
use RatchetConnectionInterface;

require 'vendor/autoload.php';

class MindmapServer implements MessageComponentInterface {
    protected $clients;

    public function __construct() {
        $this->clients = new SplObjectStorage;
    }

    public function onOpen(ConnectionInterface $conn) {
        $this->clients->attach($conn);
        echo "有新连接加入！
";
    }

    public function onMessage(ConnectionInterface $from, $msg) {
        foreach ($this->clients as $client) {
            if ($from !== $client) {
                $client->send($msg);
            }
        }
    }

    public function onClose(ConnectionInterface $conn) {
        $this->clients->detach($conn);
        echo "有连接关闭！
";
    }

    public function onError(ConnectionInterface $conn, Exception $e) {
        echo "发生错误：{$e->getMessage()}
";
        $conn->close();
    }
}

$server = IoServer::factory(
    new HttpServer(
        new WsServer(
            new MindmapServer()
        )
    ),
    8080
);

$server->run();
?>

In Vue, we can use the WebSocket API to communicate with the server to achieve real-time collaborative editing. The following is a sample code using Vue:

var ws = new WebSocket('ws://localhost:8080');

// 连接成功时触发
ws.onopen = function() {
    console.log('WebSocket连接成功！');
};

// 收到消息时触发
ws.onmessage = function(e) {
    var message = e.data;
    console.log('收到消息：' + message);
};

// 发送消息
ws.send('Hello, WebSocket!');

3. Drag and drop function
   In order to improve the user experience, we can add a drag and drop function to the mind map application so that users can freely adjust the layout of the mind map. The following is a sample code using Vue's drag and drop plug-in (vuedraggable):

<template>
  <div>
    <draggable v-model="mindmapData" class="mindmap">
      <div v-for="(item, index) in mindmapData" :key="index">
        {{ item.text }}
      </div>
    </draggable>
  </div>
</template>

<script>
import draggable from 'vuedraggable';

export default {
  components: {
    draggable
  },
  data() {
    return {
      mindmapData: [
        { text: '节点1' },
        { text: '节点2' },
        { text: '节点3' }
      ]
    };
  }
};
</script>

In this way, we can change the layout of the brain map by dragging nodes.

Conclusion:
Through this article, we learned some advanced technologies for building mind mapping applications using PHP and Vue, including data persistence, real-time collaborative editing, and drag-and-drop functions. These technologies can make our mind mapping applications more practical and easier to use. I hope this article can provide readers with some reference and guidance in building mind mapping applications.

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