PHP與小程式的線上聊天與即時通訊技術指南

composer require cboden/ratchet

<?php
require 'vendor/autoload.php';
use RatchetMessageComponentInterface;
use RatchetConnectionInterface;

class Chat implements MessageComponentInterface {
    protected $clients;

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

    public function onOpen(ConnectionInterface $conn) {
        // 新的连接建立时调用
        $this->clients->attach($conn);
    }

    public function onMessage(ConnectionInterface $from, $msg) {
        // 收到消息时调用
        $numRecv = count($this->clients) - 1;
        foreach ($this->clients as $client) {
            if ($from !== $client) {
                // 给所有其他连接发送消息
                $client->send($msg);
            }
        }
    }

    public function onClose(ConnectionInterface $conn) {
        // 连接关闭时调用
        $this->clients->detach($conn);
    }

    public function onError(ConnectionInterface $conn, Exception $e) {
        // 发生错误时调用
        echo "An error occurred: " . $e->getMessage() . "
";
        $conn->close();
    }
}

// 创建并运行WebSocket服务器
$server = IoServer::factory(
    new HttpServer(
        new WsServer(
            new Chat()
        )
    ),
    8080
);
$server->run();
?>

{
  "permission": {
    "scope.userLocation": {
      "desc": "使用通信功能"
    }
  }
}

Page({
  data: {
    messages: [],
    inputMessage: ''
  },
  onLoad: function () {
    var that = this
    wx.connectSocket({
      url: 'ws://localhost:8080'
    })
    wx.onSocketOpen(function () {
      console.log('连接成功')
    })
    wx.onSocketMessage(function (res) {
      console.log('收到消息：', res.data)
      that.data.messages.push(res.data)
      that.setData({
        messages: that.data.messages
      })
    })
    wx.onSocketClose(function () {
      console.log('连接关闭')
    })
    wx.onSocketError(function (res) {
      console.log('连接失败', res)
    })
  },
  onUnload: function () {
    wx.closeSocket()
  },
  bindInputMessage: function (e) {
    this.setData({
      inputMessage: e.detail.value
    })
  },
  sendMessage: function () {
    var message = this.data.inputMessage
    wx.sendSocketMessage({
      data: message
    })
    this.setData({
      inputMessage: ''
    })
  }
})