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    php怎么实现聊天室功能

    藏色散人藏色散人2021-07-22 09:54:58原创112

    php实现聊天室功能的方法:首先创建前端代码;然后在PHP后端文件中通过创建“private function initSocket(){...}”等方法实现聊天室功能即可。

    本文操作环境:windows7系统、PHP7.1版,DELL G3电脑

    php怎么实现聊天室功能?

    一、功能界面

    9fe3b7bf3c38b74e59402c4dcaeaf04.png

    1a6478a20108fb563e6ee71d77c054a.png

    二、具体代码实现

    1、前端代码如下

    <!DOCTYPE html>
    <html>
    <head>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <title>websocket聊天室</title>
        <link href="https://fonts.googleapis.com/css?family=Source+Sans+Pro:400,600" rel="stylesheet">
        <link rel="stylesheet" href="css/reset.min.css">
        <link rel="stylesheet" href="css/style.css">
        <style>
            .message img {
                float: left;
                width: 40px;
                height: 40px;
                margin-right: 12px;
                border-radius: 50%;
            }
            .you {
                margin-left: 60px;
                margin-top: -39px;
            }
            .me-header {
                float: right !important;
                margin-right: 0 !important;
            }
            .me {
                margin-right: 60px;
                margin-top: -39px;
            }
            .active-chat::-webkit-scrollbar, .left::-webkit-scrollbar {
                width: 2px;
            }
        </style>
    </head>
    <body>
    <div>
        <div>
            <div>
                <div style="padding: 20px 29px;height: auto;">
                    <div class="" style="font: 400 13.3333px Arial;font-weight: 400;">在线人数:<span id="numbers">0</span> 人
                    </div>
                </div>
                <ul>
                </ul>
            </div>
            <div>
                <div><span>Tips: <span>PHP之websocket聊天室</span></span></div>
                <div class="chat active-chat" data-chat="person1"
                     style="height: auto;border-width: 0px;padding: 10px;height: 483px; padding: 10px;overflow-y: auto;scrollTop: 100px">
                </div>
                <div>
                    <a href="javascript:;" class="write-link attach"></a>
                    <input type="text" id="input-value" onkeydown="confirm(event)"/>
                    <a href="javascript:;" class="write-link smiley"></a>
                    <a href="javascript:;" class="write-link send" onclick="send()"></a>
                </div>
            </div>
        </div>
    </div>
    <script src="js/index.js"></script>
    <script>
        var uname = prompt('请输入用户名', 'user' + uuid(8, 16));
        var avatar = ['bo-jackson.jpg', 'dog.png', 'drake.jpg', 'louis-ck.jpeg', 'michael-jordan.jpg', 'thomas.jpg'];
        if (avatar[Math.round(Math.random() * 10)]) {
            var headerimg = "img/" + avatar[Math.round(Math.random() * 10)];
        } else {
            var headerimg = "img/" + avatar[0];
        }
        // 创建一个 websocket 连接
        var ws = new WebSocket("ws://127.0.0.1:1238");
        // websocket 创建成功事件
        ws.onopen = function () {
            var data = "系统消息:建立连接成功";
            console.log(data);
        };
        // websocket 接收到消息事件
        ws.onmessage = function (e) {
            var data = JSON.parse(e.data);
            switch (data.type) {
                case 'handShake':
                    console.log(data.msg);
                    //发送用户登录
                    var user_info = {'type': 'login', 'msg': uname, 'headerimg': headerimg};
                    sendMsg(user_info);
                    break;
                case 'login':
                    userList(data.user_list);
                    systemMessage('系统消息: ' + data.msg + ' 已上线');
                    break;
                case 'logout':
                    userList(data.user_list);
                    if (data.msg.length > 0) {
                        systemMessage('系统消息: ' + data.msg + ' 已下线');
                    }
                    break;
                case 'user':
                    messageList(data);
                    break;
                case 'system':
                    systemMessage();
                    break;
            }
        }
        // websocket 错误事件
        ws.onerror = function () {
            var data = "系统消息 : 出错了,请退出重试.";
            alert(data);
        };
        function confirm(event) {
            var key_num = event.keyCode;
            if (13 == key_num) {
                send();
            } else {
                return false;
            }
        }
        function systemMessage(msg) {
            var html = `<div>
                <span>` + msg + `</span>
            </div>`;
            var active_chat = document.querySelector('div.active-chat');
            var oldHtml = active_chat.innerHTML;
            active_chat.innerHTML = oldHtml + html;
            active_chat.scrollTop = active_chat.scrollHeight;
        }
        function send() {
            var msg = document.querySelector("input#input-value").value;
            var reg = new RegExp("\r\n", "g");
            msg = msg.replace(reg, "");
            sendMsg({type: "user", msg: msg});
            document.querySelector("input#input-value").value = "";
        }
        function sendMsg(msg) {
            var data = JSON.stringify(msg);
            ws.send(data);
        }
        function userList(user) {
            var html = '';
            for (var i = 0; i < user.length; i++) {
                html += `<li data-chat="person1">
                        <img src="` + user[i].headerimg + `" alt=""/>
                        <span>` + user[i].username + `</span>
                        <span>` + user[i].login_time + `</span>
                        <span style="color: green;font-size: 7px;">在线</span>
                    </li>`;
            }
            document.querySelector('ul.people').innerHTML = html;
            document.querySelector('span#numbers').innerHTML = user.length;
        }
        function messageList(data) {
            if (data.from == uname) {
                var html = `<div>
                        <img src="` + data.headerimg + `" alt=""/>
                        <div class="bubble me">` + data.msg + `</div>
                    </div>`;
            } else {
                var html = `<div>
                        <img src="` + data.headerimg + `" alt=""/>
                        <div class="bubble you">` + data.msg + `</div>
                    </div>`;
            }
            var active_chat = document.querySelector('div.active-chat');
            var oldHtml = active_chat.innerHTML;
            active_chat.innerHTML = oldHtml + html;
            active_chat.scrollTop = active_chat.scrollHeight;
        }
        /**
         * 生产一个全局唯一ID作为用户名的默认值;
         *
         * @param len
         * @param radix
         * @returns {string}
         */
        function uuid(len, radix) {
            var chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split('');
            var uuid = [], i;
            radix = radix || chars.length;
            if (len) {
                for (i = 0; i < len; i++) uuid[i] = chars[0 | Math.random() * radix];
            } else {
                var r;
                uuid[8] = uuid[13] = uuid[18] = uuid[23] = '-';
                uuid[14] = '4';
                for (i = 0; i < 36; i++) {
                    if (!uuid[i]) {
                        r = 0 | Math.random() * 16;
                        uuid[i] = chars[(i == 19) ? (r & 0x3) | 0x8 : r];
                    }
                }
            }
            return uuid.join('');
        }
    </script>
    </body>
    </html>

    2、后端代码如下

    <?php
    /**
     * Created by PhpStorm.
     * User: 25754
     * Date: 2019/4/23
     * Time: 14:13
     */
    class socketServer
    {
        const LISTEN_SOCKET_NUM = 9;
        const LOG_PATH = "./log/";
        private $_ip = "127.0.0.1";
        private $_port = 1238;
        private $_socketPool = array();
        private $_master = null;
        public function __construct()
        {
            $this->initSocket();
        }
        private function initSocket()
        {
            try {
                //创建socket套接字
                $this->_master = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
                // 设置IP和端口重用,在重启服务器后能重新使用此端口;
                socket_set_option($this->_master, SOL_SOCKET, SO_REUSEADDR, 1);
                //绑定地址与端口
                socket_bind($this->_master, $this->_ip, $this->_port);
                //listen函数使用主动连接套接口变为被连接套接口,使得一个进程可以接受其它进程的请求,从而成为一个服务器进程。在TCP服务器编程中listen函数把进程变为一个服务器,并指定相应的套接字变为被动连接,其中的能存储的请求不明的socket数目。
                socket_listen($this->_master, self::LISTEN_SOCKET_NUM);
            } catch (Exception $e) {
                $this->debug(array("code: " . $e->getCode() . ", message: " . $e->getMessage()));
            }
            //将socket保存到socket池中
            $this->_socketPool[0] = array('resource' => $this->_master);
            $pid = getmypid();
            $this->debug(array("server: {$this->_master} started,pid: {$pid}"));
            while (true) {
                try {
                    $this->run();
                } catch (Exception $e) {
                    $this->debug(array("code: " . $e->getCode() . ", message: " . $e->getMessage()));
                }
            }
        }
        private function run()
        {
            $write = $except = NULL;
            $sockets = array_column($this->_socketPool, 'resource');
            $read_num = socket_select($sockets, $write, $except, NULL);
            if (false === $read_num) {
                $this->debug(array('socket_select_error', $err_code = socket_last_error(), socket_strerror($err_code)));
                return;
            }
            foreach ($sockets as $socket) {
                if ($socket == $this->_master) {
                    $client = socket_accept($this->_master);
                    if ($client === false) {
                        $this->debug(['socket_accept_error', $err_code = socket_last_error(), socket_strerror($err_code)]);
                        continue;
                    }
                    //连接
                    $this->connection($client);
                } else {
                    //接受数据
                    $bytes = @socket_recv($socket, $buffer, 2048, 0);
                    if ($bytes == 0) {
                        $recv_msg = $this->disconnection($socket);
                    } else {
                        if ($this->_socketPool[(int)$socket]['handShake'] == false) {
                            $this->handShake($socket, $buffer);
                            continue;
                        } else {
                            $recv_msg = $this->parse($buffer);
                        }
                    }
                    $msg = $this->doEvents($socket, $recv_msg);
                    echo($msg);
                    socket_getpeername ( $socket  , $address ,$port );
                    $this->debug(array(
                        'send_success',
                        json_encode($recv_msg),
                        $address,
                        $port
                    ));
                    $this->broadcast($msg);
                }
            }
        }
        /**
         * 数据广播
         * @param $data
         */
        private function broadcast($data)
        {
            foreach ($this->_socketPool as $socket) {
                if ($socket['resource'] == $this->_master) {
                    continue;
                }
                socket_write($socket['resource'], $data, strlen($data));
            }
        }
        /**
         * 业务处理
         * @param $socket
         * @param $recv_msg
         * @return string
         */
        private function doEvents($socket, $recv_msg)
        {
            $msg_type = $recv_msg['type'];
            $msg_content = $recv_msg['msg'];
            $response = [];
            switch ($msg_type) {
                case 'login':
                    $this->_socketPool[(int)$socket]['userInfo'] = array("username" => $msg_content, 'headerimg' => $recv_msg['headerimg'], "login_time" => date("h:i"));
                    // 取得最新的名字记录
                    $user_list = array_column($this->_socketPool, 'userInfo');
                    $response['type'] = 'login';
                    $response['msg'] = $msg_content;
                    $response['user_list'] = $user_list;
                    break;
                case 'logout':
                    $user_list = array_column($this->_socketPool, 'userInfo');
                    $response['type'] = 'logout';
                    $response['user_list'] = $user_list;
                    if ($nowUserSocket = @$this->_socketPool[(int)$socket]) {
                        $response['msg'] = $nowUserSocket['userInfo']['username'];
                    }else{
                        $response['msg'] = '';
                    }
                    break;
                case 'user':
                    $userInfo = $this->_socketPool[(int)$socket]['userInfo'];
                    $response['type'] = 'user';
                    $response['from'] = $userInfo['username'];
                    $response['msg'] = $msg_content;
                    $response['headerimg'] = $userInfo['headerimg'];
                    break;
            }
            return $this->frame(json_encode($response));
        }
        /**
         * socket握手
         * @param $socket
         * @param $buffer
         * @return bool
         */
        public function handShake($socket, $buffer)
        {
            $acceptKey = $this->encry($buffer);
            $upgrade = "HTTP/1.1 101 Switching Protocols\r\n" .
                "Upgrade: websocket\r\n" .
                "Connection: Upgrade\r\n" .
                "Sec-WebSocket-Accept: " . $acceptKey . "\r\n\r\n";
            // 写入socket
            socket_write($socket, $upgrade, strlen($upgrade));
            // 标记握手已经成功,下次接受数据采用数据帧格式
            $this->_socketPool[(int)$socket]['handShake'] = true;
            socket_getpeername ( $socket  , $address ,$port );
            $this->debug(array(
                'hand_shake_success',
                $socket,
                $address,
                $port
            ));
            //发送消息通知客户端握手成功
            $msg = array('type' => 'handShake', 'msg' => '握手成功');
            $msg = $this->frame(json_encode($msg));
            socket_write($socket, $msg, strlen($msg));
            return true;
        }
        /**
         * 帧数据封装
         * @param $msg
         * @return string
         */
        private function frame($msg)
        {
            $frame = [];
            $frame[0] = '81';
            $len = strlen($msg);
            if ($len < 126) {
                $frame[1] = $len < 16 ? '0' . dechex($len) : dechex($len);
            } else if ($len < 65025) {
                $s = dechex($len);
                $frame[1] = '7e' . str_repeat('0', 4 - strlen($s)) . $s;
            } else {
                $s = dechex($len);
                $frame[1] = '7f' . str_repeat('0', 16 - strlen($s)) . $s;
            }
            $data = '';
            $l = strlen($msg);
            for ($i = 0; $i < $l; $i++) {
                $data .= dechex(ord($msg{$i}));
            }
            $frame[2] = $data;
            $data = implode('', $frame);
            return pack("H*", $data);
        }
        /**
         * 接受数据解析
         * @param $buffer
         * @return mixed
         */
        private function parse($buffer)
        {
            $decoded = '';
            $len = ord($buffer[1]) & 127;
            if ($len === 126) {
                $masks = substr($buffer, 4, 4);
                $data = substr($buffer, 8);
            } else if ($len === 127) {
                $masks = substr($buffer, 10, 4);
                $data = substr($buffer, 14);
            } else {
                $masks = substr($buffer, 2, 4);
                $data = substr($buffer, 6);
            }
            for ($index = 0; $index < strlen($data); $index++) {
                $decoded .= $data[$index] ^ $masks[$index % 4];
            }
            return json_decode($decoded, true);
        }
        // 提取 Sec-WebSocket-Key 信息
        private function getKey($req)
        {
            $key = null;
            if (preg_match("/Sec-WebSocket-Key: (.*)\r\n/", $req, $match)) {
                $key = $match[1];
            }
            return $key;
        }
        //加密 Sec-WebSocket-Key
        private function encry($req)
        {
            $key = $this->getKey($req);
            return base64_encode(sha1($key . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', true));
        }
        /**
         * 连接socket
         * @param $client
         */
        public function connection($client)
        {
            socket_getpeername ( $client  , $address ,$port );
            $info = array(
                'resource' => $client,
                'userInfo' => '',
                'handShake' => false,
                'ip' => $address,
                'port' => $port,
            );
            $this->_socketPool[(int)$client] = $info;
            $this->debug(array_merge(['socket_connect'], $info));
        }
        /**
         * 断开连接
         * @param $socket
         * @return array
         */
        public function disconnection($socket)
        {
            $recv_msg = array(
                'type' => 'logout',
                'msg' => @$this->_socketPool[(int)$socket]['username'],
            );
            unset($this->_socketPool[(int)$socket]);
            return $recv_msg;
        }
        /**
         * 日志
         * @param array $info
         */
        private function debug(array $info)
        {
            $time = date('Y-m-d H:i:s');
            array_unshift($info, $time);
            $info = array_map('json_encode', $info);
            file_put_contents(self::LOG_PATH . 'websocket_debug.log', implode(' | ', $info) . "\r\n", FILE_APPEND);
        }
    }
    new socketServer();

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