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

<?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();
?>

<?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();
?>

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!');

<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>