php怎么实现聊天功能-侯体宗的博客

php怎么实现聊天功能
php / 管理员发布于 7年前 369

php怎么实现聊天功能

1、在前端使用Ajax定时轮询访问php脚本，php再进行查询聊天数据进行返回给前端，最后前端将其进行渲染；

代码示例：

<html><head><title>聊天室</title><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><script src="../jquery.min.js"></script><script>$(function(){    $("#post").click(function(){var content=$("#content").val();    if(!$.trim(content)){       alert('请填写内容');       return false;    }    $("#content").val("");    $.post("ajax.php", {content:content});});})        function getData(msg){        if(msg == undefined)        {msg = '';}        $.post("get.php",{"msg":msg},function(data){//var myjson = eval("("+data+")");if(data){    var chatcontent = '';    var obj = eval('('+data+')');    $.each(obj,function(key,val){        chatcontent += "<div class='username'>"+val['username']+" 说:</div>";        chatcontent += "<div class='content'>"+val['content']+"</div>";    })    $("#chatshow").html(chatcontent);}getData();})        }        // function getUser(msg){    //     if(msg == undefined){    //         msg = '';        //     }    //     $.post("getuser.php",{"msg":msg},function(data){    //         //var myjson = eval("("+data+")");    //         if(data){    // var chatcontent = '';    // var obj = eval('('+data+')');    // $.each(obj,function(key,val){    //     chatcontent += "<div class='username'>"+val['username']+" 说:</div>";    //     chatcontent += "<div class='content'>"+val['content']+"</div>";    // })    // $("#chatshow").html(chatcontent);    //         }    //         getData();        //     })        // }        getData("one");// $(function(){    //     $("#userlist p").click(function(){    //         $("#content").val("@"+$(this).text()+" ");        //     })        // })        // $(function(){    //     $(document).keypress(function(e){    //         if(e.ctrlKey && e.which == 13 || e.which == 10) {// var content=$("#content").val();    // if(!$.trim(content)){    //    alert('请填写内容');    //    return false;    // }    // $("#content").val("");        // $.post("ajax.php", {content:content});    //         }          //     })    //     //alert(event.clientX+document.body.clientWidth);    // })        /*window.onbeforeunload=function (){         //return("===onbeforeunload===");         if(event.clientX>document.body.clientWidth && event.clientY < 0 || event.altKey){ return("你关闭了浏览器");         }else{ return(document.body.clientWidth);         }     } */    </script><style>#chat{margin:0 auto;}#chatshow{width:500px;height:400px;overflow:auto;border:1px solid #ccc;float:left;}#userlist{width:100px;height:400px;overflow:auto;border:1px solid #ccc;float:left;margin-right:2px;}#userlist p{color:#0F0; cursor:pointer;}.clearboth{clear:both;}.username{font-weight:bold;color:#00F;font-size:12px;margin-bottom:3px;margin-top:8px;}</style></head><body><div id="chat"><div id="userlist"><div style="font-size:12px;font-weight:bold;">在线用户列表</div><div class="userlist"><?php     // $dsn = "mysql:host=localhost;dbname=test;charset=utf8'"; //    $db = new PDO($dsn, 'root', 'root');    $db = new PDO('mysql:dbname=test;host=127.0.0.1;charset=utf8', 'root', 'adminroot');    $rs = $db->prepare("select * from chat where is_login = '1'");    $rs->execute();    while($row = $rs->fetch()){        echo '<p>'.$row['username'].'</p>';        }?></div></div><div id="chatshow"></div></div><div class="clearboth"></div><div><textarea name="content" id="content" style="width:600px;height:100px"></textarea><input type='button' name='tj' id="post" value='发布' ></div></body></html>

<?php/*session_start();$mem = new Memcache;$mem->connect("localhost",11211);if(isset($_POST['content'])){    $con['username'] = $_SESSION["username"];    $con['content'] = $_POST["content"];        $data = $mem->get('chat');    $data[] = $con;    $mem->set("chat",$data,0,0);    }$mem->close();*/    if(isset($_POST['content'])){        session_start();        $filename = date("Ymd",time()).".txt";        if(file_exists($filename)){$content = file_get_contents($filename);$data = json_decode($content,true);        $con['username'] = $_SESSION["username"];$con['content'] = $_POST["content"];$data[] = $con;$file = fopen($filename,"w");fwrite($file,json_encode($data));fclose($file);}else{$file = fopen($filename,"w");$con['username'] = $_SESSION["username"];$con['content'] = $_POST["content"];$data[] = $con;fwrite($file,json_encode($data));fclose($file);}    }?>

<?php /*require 'conn.inc';function getData(){    $sql="SELECT count(*) FROM  `talkroom`";    $res=mysql_query($sql);    $count = mysql_fetch_row($res);        return $count;    }$old = getData();while(true){    $new = getData();    if($new[0]>$old[0]){        //echo json_encode($new['data']);        //print_r($new);        echo '2222222222'.'<br/>';    }    //echo '<br />11111111111111111111111111111111111111111111111111111111111111111111';    usleep(1000);}*//*set_time_limit(0);$mem = new Memcache;$mem->connect("localhost",11211);$count = count($mem->get("chat"));$com = true;//$mem->delete('chat');if($_POST['msg'] == "one"){    exit(json_encode($mem->get("chat")));    }if($_POST['msg'] == "break"){    $com = false;    }$time1 = time();while(true){    if($com){        $data = $mem->get("chat");        if(count($data)>$count){echo json_encode($data);break;        }        usleep(300);    }else{        break;        }}$mem->close();*/set_time_limit(0);$filename = date("Ymd",time()).".txt";if(file_exists($filename)){    $content = file_get_contents($filename);    $data = json_decode($content,true);$count = count($data);    // echo $count;die;    if($_POST['msg'] == "one"){        exit(json_encode($data));        }        while(true){    $contents = file_get_contents($filename);        $datas = json_decode($contents,true);        $counts = count($datas);if($counts>$count){echo json_encode($datas);break;        }        usleep(300);    }}else{    $file = fopen($filename,"w");    $con['username'] = "系统消息";    $con['content'] = "欢迎来到EPGO聊天室";    $data[] = $con;    fwrite($file,json_encode($data));    fclose($file);        exit(json_encode($data));        }?>

2、使用WebSocket和服务器进行长连接，来实现聊天功能。

客户端代码：

<!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>

服务端代码：

<?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)    {        //联系我    }    /**     * 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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