php怎么实现聊天功能

来源：动视网责编：小采时间：2020-11-03 12:31:12

php怎么实现聊天功能

php怎么实现聊天功能: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=&qu

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导读php怎么实现聊天功能: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=&qu

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("
", "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
" .
 "Upgrade: websocket
" .
 "Connection: Upgrade
" .
 "Sec-WebSocket-Accept: " . $acceptKey . "

";

 // 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: (.*)
/", $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) . "
", FILE_APPEND);
 }
}

new socketServer();

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